DCT

5:26-cv-00105

Velocity Communication Tech LLC v. Hisense Co Ltd

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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 5:26-cv-00105, E.D. Tex., 07/31/2026
  • Venue Allegations: Plaintiff alleges venue is proper because all Defendants are foreign corporations, and the infringement action may therefore be instituted in any judicial district. Plaintiff further asserts personal jurisdiction based on Defendants placing accused products into the stream of commerce with the knowledge that they will be sold in the Eastern District of Texas, identifying specific retailers in the district.
  • Core Dispute: Plaintiff alleges that Defendant's televisions and laser projection systems that comply with the Wi-Fi 6 (IEEE 802.11ax) standard infringe a portfolio of eleven U.S. patents related to wireless communication technologies.
  • Technical Context: The lawsuit concerns foundational technologies for high-efficiency wireless local area networks (WLANs), specifically the 802.11ax standard, which underpins the widely adopted Wi-Fi 6 and Wi-Fi 6E connectivity in consumer electronics.
  • Key Procedural History: The complaint notes that in prior litigation against other parties, the U.S. District Court for the Eastern District of Texas denied motions challenging the patent eligibility of the '213, '832, '343, and the '870 family of patents ('870, '765, '401, '096) under 35 U.S.C. § 101. These prior rulings, while not binding on the current defendant, suggest a judicial validation of the patents' subject matter eligibility at the pleading stage.

Case Timeline

Date Event
2004-12-20 '343 Patent Priority Date
2005-12-07 '573 Patent Priority Date
2007-03-23 '570 Patent Priority Date
2007-08-28 '832 Patent Priority Date
2007-10-15 '870, '765, '401, '096 Patents Priority Date
2008-09-15 '213 Patent Priority Date
2010-04-05 '577 Patent Priority Date
2012-06-29 '648 Patent Priority Date
2012-07-03 '870 Patent Issue Date
2012-08-07 '832 Patent Issue Date
2012-09-04 '213 Patent Issue Date
2012-09-11 '573 Patent Issue Date
2012-09-18 '343 Patent Issue Date
2014-02-04 '765 Patent Issue Date
2014-03-18 '570 Patent Issue Date
2015-07-14 '401 Patent Issue Date
2016-09-13 '577 Patent Issue Date
2017-03-14 '648 Patent Issue Date
2019-02-05 '096 Patent Issue Date
2020-09-29 NXP submits Letter of Assurance to IEEE for 802.11ax patents
2024-03-04 ZTE submits Letter of Assurance to IEEE for 802.11ax patents
2025-07-01 Velocity files suit against other Wi-Fi 6 manufacturers (approx. date)
2026-04-13 Court denies § 101 challenges against several asserted patents in prior cases
2026-07-31 Complaint Filing Date

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 8,675,570 - "Scalable OFDM and OFDMA Bandwidth Allocation in Communication Systems"

  • Issued: March 18, 2014

The Invention Explained

  • Problem Addressed: The patent addresses the technical challenge of efficiently allocating bandwidth in wireless systems like Orthogonal Frequency Division Multiplexing (OFDM) Compl. ¶42 Conventional methods used non-data-bearing "guard bands" to prevent interference between channels, which created wasteful gaps in the usable spectrum and resulted in lower spectral efficiency (Compl. ¶42; Compl. ¶43; Compl. ¶44, Compl. ¶citing Ex. 1, Compl. ¶at, Compl. ¶¶col. 6:27-34).
  • The Patented Solution: The invention proposes using a common, precisely chosen subcarrier spacing that is mathematically aligned with both the channel raster and all nominal channel bandwidths Compl. ¶45 This precise alignment allows for the aggregation of multiple carriers with reduced or eliminated guard bands, which minimizes inter-carrier interference and maximizes the use of available spectrum (Compl. ¶¶45; Compl. ¶47).
  • Technical Importance: This approach provided a scalable and spectrally efficient method for allocating bandwidth, improving the flexible aggregation of different channel widths and enhancing the data capacity and overall efficiency of wireless networks Compl. ¶¶46-47

Key Claims at a Glance

  • The complaint asserts claims 1, 2, 3, 4, 5, 6, 9, 12, and 13 Compl. ¶189 The full text of the independent claims is not provided in the complaint.
  • Based on the complaint's description, the essential elements of an independent claim appear to include a method for allocating bandwidth in an OFDM or OFDMA system by:
    • Choosing a common subcarrier spacing for orthogonal subcarriers.
    • Selecting a sampling frequency based on the nominal channel bandwidth.
    • Using subcarriers within the nominal channel bandwidth for signal transmission without assigning subcarriers as guard bands at the channel's edges.
  • The complaint does not explicitly state whether it reserves the right to assert additional claims.

U.S. Patent No. 8,260,213 - "Method and Apparatus to Adjust a Tunable Reactive Element"

  • Issued: September 4, 2012

The Invention Explained

  • Problem Addressed: The patent is directed to solving impedance mismatch and reactance drift in wireless RF transmission systems Compl. ¶53 Prior art systems struggled with the stability of tunable reactive elements (like Voltage Variable Capacitors), which could be affected by drift due to changes in temperature or residual polarization, leading to reduced antenna performance Compl. ¶¶54-55 Compl. ¶55, citing Ex. 2, at col. 1:19-21 Compl. ¶55, citing Ex. 2, at col. 1:25-26
  • The Patented Solution: The invention provides an adaptive tuning architecture that dynamically adjusts antenna system components in real time Compl. ¶56 It employs a reactance detection circuit to monitor the transmitted signal and an error correction circuit to detect drift from a desired state, which then generates a correction signal to keep the antenna system optimally tuned Compl. ¶57 The complaint notes that the recited signals are electronic, and the "integration" is performed by an electronic circuit or logic, referencing specific patent figures Compl. ¶61, citing Ex. 2, Figs. 5-6, and 9
  • Technical Importance: This real-time compensation for reactance drift improves RF power transfer efficiency and modulation accuracy, which is particularly beneficial for devices compliant with the 802.11ax standard that operate across multiple frequencies and bandwidths Compl. ¶¶58; Compl. ¶65

Key Claims at a Glance

  • The complaint asserts claims 1, 2, 3, 4, 6, 8, 9, 10, 12, 13, 14, 16, and 17 Compl. ¶207 The full text of the independent claims is not provided in the complaint.
  • Based on the complaint's description, the essential elements of an independent claim appear to include an apparatus or method comprising:
    • A signal source coupled to a first tunable reactive element that generates a first signal.
    • A reactance detection circuit that detects the reactance of the element from the first signal and generates a second signal representing the measured reactance.
    • An error correction circuit that receives a control signal for a desired reactance, compares it to the second signal to detect drift, and generates a third signal.
    • Applying the third signal to the first tunable reactive element to adjust its reactance to the desired value.
  • The complaint does not explicitly state whether it reserves the right to assert additional claims.

Multi-Patent Capsule: U.S. Patent No. 8,238,832

  • Patent Identification: U.S. Patent No. 8,238,832, "Antenna Optimum Beam Forming for Multiple Protocol Coexistence on a Wireless Device," issued August 7, 2012.
  • Technology Synopsis: The patent addresses signal interference (crosstalk) when a single wireless device communicates simultaneously with multiple devices using different protocols Compl. ¶71 The solution involves generating and shaping multiple antenna beam patterns to direct a signal to its intended recipient while actively suppressing its strength in the direction of other simultaneous communications, thereby improving throughput Compl. ¶74
  • Asserted Claims: Claims 18, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 34, and 35 are asserted Compl. ¶225
  • Accused Features: The accused Access Points that implement the 802.11ax standard are alleged to infringe Compl. ¶222

Multi-Patent Capsule: U.S. Patent No. 8,270,343

  • Patent Identification: U.S. Patent No. 8,270,343, "Broadcasting of Textual and Multimedia Information," issued September 18, 2012.
  • Technology Synopsis: The patent addresses inefficient transmission of mixed-media content, where large files cause excessive latency Compl. ¶85 The solution is a method where a single block of text and multiple sub-blocks of related multimedia data are packaged into time-sliced packets for efficient, simultaneous transmission Compl. ¶86
  • Asserted Claims: Claims 1, 3, 7, 10, 11, 13, and 15 are asserted Compl. ¶243
  • Accused Features: All accused products that implement the 802.11ax standard are alleged to infringe Compl. ¶240

Multi-Patent Capsule: U.S. Patent No. 8,213,870

  • Patent Identification: U.S. Patent No. 8,213,870, "Beamforming Using Predefined Spatial Mapping Matrices," issued July 3, 2012.
  • Technology Synopsis: The patent addresses deficiencies in MIMO systems, such as inefficient sounding processes and non-adaptive mapping Compl. ¶100 The solution involves storing a codebook of predefined spatial mapping matrices, iteratively transmitting data packets using different matrices, and selecting a matrix for subsequent transmissions based on measured reception quality (e.g., packet-error-rate) Compl. ¶98
  • Asserted Claims: Claims 1, 2, 3, 5, 6, 7, 8, 9, 10, 12, 13, 14, 16, 17, 18, 19, and 20 are asserted Compl. ¶261
  • Accused Features: The accused Access Points that implement the 802.11ax standard are alleged to infringe Compl. ¶258

Multi-Patent Capsule: U.S. Patent No. 8,644,765

  • Patent Identification: U.S. Patent No. 8,644,765, "Beamforming Using Predefined Spatial Mapping Matrices," issued February 4, 2014.
  • Technology Synopsis: The patent, related to the '870 patent, addresses shortcomings in traditional beamforming, such as limited range and control overhead Compl. ¶¶115-116 The solution involves iteratively transmitting data packets with different predefined matrices, receiving channel estimates, selecting a matrix based on those estimates, and re-selecting if a packet error rate threshold is exceeded Compl. ¶117
  • Asserted Claims: Claims 1, 2, 3, 4, 7, 8, 9, 10, 12, 14, 15, 16, and 17 are asserted Compl. ¶279
  • Accused Features: The accused Access Points that implement the 802.11ax standard are alleged to infringe Compl. ¶276

Multi-Patent Capsule: U.S. Patent No. 9,083,401

  • Patent Identification: U.S. Patent No. 9,083,401, "Beamforming Using Predefined Spatial Mapping Matrices," issued July 14, 2015.
  • Technology Synopsis: Also in the '870 patent family, this patent addresses inefficient and range-limited traditional beamforming techniques Compl. ¶¶129-130 The solution is a non-conventional approach that iteratively transmits data packets using different predefined matrices, selects the best matrix based on received channel estimates, and continues to adapt by selecting another matrix if a reception quality metric falls below a threshold Compl. ¶131
  • Asserted Claims: Claims 1, 2, 4, 7, 8, 9, 15, 16, 17, and 18 are asserted Compl. ¶297
  • Accused Features: The accused Access Points that implement the 802.11ax standard are alleged to infringe Compl. ¶294

Multi-Patent Capsule: U.S. Patent No. 10,200,096

  • Patent Identification: U.S. Patent No. 10,200,096, "Beamforming Using Predefined Spatial Mapping Matrices," issued February 5, 2019.
  • Technology Synopsis: This patent, also in the '870 family, addresses the limited range of traditional sounding packets Compl. ¶144 The solution involves using a codebook of predefined matrices, measuring a reception quality metric (e.g., packet error rate) for each, and selecting the matrix with the highest quality for subsequent transmissions, moving channel selection into the data path Compl. ¶¶146; Compl. ¶149
  • Asserted Claims: Claims 1, 2, 3, 5, 6, and 7 are asserted Compl. ¶315
  • Accused Features: The accused Access Points that implement the 802.11ax standard are alleged to infringe Compl. ¶312

Multi-Patent Capsule: U.S. Patent No. 9,444,577

  • Patent Identification: U.S. Patent No. 9,444,577, "Calibration Correction for Implicit Beamformer Using an Explicit Beamforming Technique in a Wireless MIMO Communication System," issued September 13, 2016.
  • Technology Synopsis: The patent addresses the failure of channel reciprocity in implicit beamforming systems, which is caused by RF chain impairments Compl. ¶159 The solution is a non-conventional method that combines implicit beamforming with an explicit, bidirectional calibration exchange, allowing a transceiver to determine a device-specific correction matrix to correct for hardware-induced errors Compl. ¶160
  • Asserted Claims: Claims 1, 2, 3, 4, 5, 7, 8, 10, 11, 12, 13, 18, 19, 20, 22, 24, and 25 are asserted Compl. ¶333
  • Accused Features: The accused Access Points that implement the 802.11ax standard are alleged to infringe Compl. ¶330

Multi-Patent Capsule: U.S. Patent No. 8,265,573

  • Patent Identification: U.S. Patent No. 8,265,573, "Wireless Subscriber Communication Unit and Method of Power Control with Back-Off Therefore," issued September 11, 2012.
  • Technology Synopsis: The patent addresses interference and inefficient spectrum use in crowded wireless environments Compl. ¶165 The solution is an advanced power control method where a transmitter adjusts and "backs off" its output power in response to network conditions, such as interference, to improve overall transmission speed and efficiency Compl. ¶166 This is aimed at preventing spectral degradation from high-power transmissions Compl. ¶¶168-169
  • Asserted Claims: Claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, and 19 are asserted Compl. ¶350
  • Accused Features: The accused products certified for operation with the 6 GHz extension of the 802.11ax Standard (Wi-Fi 6E) are alleged to infringe Compl. ¶347

Multi-Patent Capsule: U.S. Patent No. 9,596,648

  • Patent Identification: U.S. Patent No. 9,596,648, "Unified Beacon Format," issued March 14, 2017.
  • Technology Synopsis: The patent addresses the inefficiency and high power consumption associated with broadcasting large, periodic beacon frames in wireless networks Compl. ¶¶176-178 The solution is a "unified beacon format" that allows a device to determine whether to send a concise "short" beacon or a comprehensive "full" beacon, with a specific indicator in the frame identifying which type is being sent Compl. ¶180
  • Asserted Claims: Claims 1, 2, 4, 5, 7, 8, 10, and 11 are asserted Compl. ¶368
  • Accused Features: The accused Access Points that implement the 802.11ax standard are alleged to infringe Compl. ¶365

III. The Accused Instrumentality

Product Identification

The accused products are a wide range of Hisense-branded televisions and laser projection television systems that implement the IEEE 802.11ax (Wi-Fi 6) standard Compl. ¶13 Compl. ¶186 Representative products include the Hisense ULED U6, U7, U8, U9, and ULED X/UX series televisions and the PX3-PRO, L5H, and L9/L9Q series laser projectors Compl. ¶186

Functionality and Market Context

The core accused functionality is the products' compliance with the 802.11ax standard, which Plaintiff alleges is essential for their operation and necessarily infringes the patents-in-suit Compl. ¶3 Compl. ¶186 The complaint alleges these products are manufactured outside the U.S., imported, and sold nationwide through major retailers such as Walmart, Best Buy, and Amazon.com Compl. ¶13 The complaint provides visual evidence from the Hisense website's "Where to Buy" feature, which identifies a Walmart in Texarkana, Texas, as a retailer for an accused product Compl. ¶14 Another screenshot from the Hisense website shows an accused product available for same-day purchase ("In Stock Today!") at a Best Buy in Frisco, Texas Compl. ¶19 These allegations and visuals are used to establish the products' significant commercial presence in the judicial district and throughout the United States.

IV. Analysis of Infringement Allegations

The complaint references claim-chart exhibits for each asserted patent (e.g., Ex. 12 for the '570 Patent, Ex. 13 for the '213 Patent) but does not include these exhibits Compl. ¶189 Compl. ¶207 Accordingly, the infringement allegations are summarized in prose.

'570 Patent Infringement Allegations

The complaint's central infringement theory is that compliance with the IEEE 802.11ax standard necessarily results in infringement of the '570 Patent Compl. ¶3 Compl. ¶189 The complaint alleges that the 802.11ax standard incorporates the '570 Patent's technology for OFDMA bandwidth allocation Compl. ¶198 The theory suggests that the standard's method for flexibly partitioning spectrum for multiple users without performance degradation inherently uses the claimed invention of a precisely chosen subcarrier spacing to eliminate wasteful guard bands, thereby improving spectral efficiency (Compl. ¶41; Compl. ¶42). The infringement allegation is thus one of standards-essentiality, where the accused products are alleged to infringe by virtue of implementing the standard Compl. ¶189

'213 Patent Infringement Allegations

Similarly, the complaint alleges that devices compliant with the 802.11ax standard necessarily infringe the '213 Patent Compl. ¶207 The infringement theory is that the accused products, which must communicate over multiple frequencies and bandwidths and exhibit operating mode switching as part of 802.11ax compliance, require the claimed adaptive tuning architecture to ensure efficient and high-fidelity signal transmission (Compl. ¶58). The complaint alleges that the accused products contain the claimed combination of circuits that measures reactance, detects drift from a desired state by comparison, and generates a correction signal to compensate for that drift in real time (Compl. ¶¶57; Compl. ¶63).

Identified Points of Contention

  • Standard-Essentiality vs. Claim Scope: A primary point of contention for all asserted patents will likely be whether compliance with the 802.11ax standard necessarily requires practicing the claimed inventions. A defendant may argue that the standard provides for optional implementations or that its products practice the standard in a way that avoids one or more specific claim limitations.
  • Factual Operation of Accused Products: For technology-specific patents like the '213 Patent, a key dispute will center on the actual implementation within the accused products. The complaint alleges the presence of specific functional circuits (e.g., reactance detection, error correction) Compl. ¶57, but this is based on information and belief. A central question for the court will be an evidentiary one: what is the specific architecture and operating method of the RF tuning circuitry in the Hisense products, and does it map to each element of the asserted claims?

V. Key Claim Terms for Construction

'570 Patent: "common subcarrier spacing... aligned with both the channel raster and all nominal channel bandwidths"

  • The Term: "a common, precisely chosen subcarrier spacing that is mathematically aligned with both the channel raster and all nominal channel bandwidths" Compl. ¶45
  • Context and Importance: Practitioners may focus on this term as it defines the core of the asserted solution. The definition of "mathematically aligned" and what constitutes the "channel raster" will be critical to determining if the 802.11ax standard's specified parameters fall within the claim scope.
  • Intrinsic Evidence for a Broader Interpretation: Language in the specification describing the general goal of improving "spectral efficiency by allowing multiple carriers to be aggregated with reduced or eliminated guard bands" could be cited to support a more functional interpretation not tied to a single, rigid mathematical formula Compl. ¶45
  • Intrinsic Evidence for a Narrower Interpretation: The background's specific example of a 9.6 kHz subcarrier spacing that "cannot be divided evenly by nominal carrier bandwidths" could be used to argue for a narrower construction, limiting the claim to solving this precise mathematical divisibility problem Compl. ¶44, citing Ex. 1, at, col. 6:27-34

'213 Patent: "integrating the difference signal"

  • The Term: "integrating the difference signal" (Compl. ¶61).
  • Context and Importance: The patent's eligibility was previously upheld in part because the invention was found to be more than just an abstract idea implemented on a computer; it was a specific technological improvement Compl. ¶¶66-67 The construction of "integrating" will be central to this issue. Practitioners may focus on this term to determine if it requires a specific hardware circuit (e.g., an analog integrator) or if it can be read more broadly to cover a software-based calculation.
  • Intrinsic Evidence for a Broader Interpretation: The complaint itself states that the integration is "performed by an electronic integration circuit or processing logic," which suggests the term could encompass both hardware and software/firmware implementations (Compl. ¶61).
  • Intrinsic Evidence for a Narrower Interpretation: A party could argue that the term should be limited by the specific embodiments shown in the patent's figures, which the complaint references Compl. ¶61, citing Ex. 2, Figs. 5-6, and 9 The court's prior finding that the invention was not merely adding "computer functionality" may also support a narrower, hardware-centric interpretation Compl. ¶67

VI. Other Allegations

Indirect Infringement

The complaint alleges inducement of infringement, stating that Hisense provides user manuals, product support, and marketing materials that encourage and instruct customers to use the accused products in their infringing manner (i.e., by using their Wi-Fi 6 capabilities) Compl. ¶196 The complaint also alleges contributory infringement, asserting that the infringing components are material to the inventions, are not staple articles of commerce, have no substantial non-infringing uses, and are known by Hisense to be especially adapted for infringement Compl. ¶197

Willful Infringement

The complaint makes detailed allegations of willful infringement based on both pre-suit and post-suit knowledge. It alleges Hisense had knowledge of patents essential to the 802.11ax standard at least as early as September 2020 and March 2024, when original patent owners NXP and ZTE submitted Letters of Assurance to the IEEE Compl. ¶¶35; Compl. ¶193 It further alleges notice from prior lawsuits filed by Velocity against other Wi-Fi 6 product manufacturers in July 2025 Compl. ¶37; Compl. ¶194 The complaint contends that Hisense "willfully blinded itself to its infringement" and acted in a manner "characteristic of a pirate" Compl. ¶199; Compl. ¶200

VII. Analyst's Conclusion: Key Questions for the Case

  • A central issue will be one of technical essentiality: does compliance with the IEEE 802.11ax standard, as implemented in the accused Hisense products, necessarily require practicing the specific methods recited in the asserted claims? The case may turn on whether the standard mandates the patented techniques or merely permits them as one of several non-infringing alternatives.
  • A key legal question will concern willful infringement: can pre-suit knowledge be established based on public Letters of Assurance submitted to a standards body by a predecessor-in-interest, or on litigation against industry competitors? The court's evaluation of these facts will be critical in determining whether Hisense's conduct rises to the level of objective recklessness required for enhanced damages.
  • A significant procedural question will be the persuasive force of prior judicial rulings. Given that the court has already denied § 101 eligibility challenges against many of these same patents in parallel litigation, a primary question is whether Hisense can present new evidence or arguments sufficient to overcome the significant analytical groundwork laid out in those prior orders.
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