DCT

1:26-cv-05866

SpectraNet Tech LLC v. Jump Financial LLC

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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 1:26-cv-05866, N.D. Ill., 05/20/2026
  • Venue Allegations: Venue is alleged to be proper based on Defendants having regular and established joint places of business in the district, including operating at least one transceiver within the district.
  • Core Dispute: Plaintiff alleges that Defendants' high-frequency trading (HFT) systems, which use shortwave radio communications, infringe three patents related to low-latency wireless messaging.
  • Technical Context: The lawsuit concerns technology for optimizing long-distance, low-bandwidth radio communications, a method that has gained importance in the HFT industry for its potential to transmit trading data faster than fiber optic cables.
  • Key Procedural History: The complaint alleges that one or more Defendants were aware of the patent family as early as June 18, 2018, through the express disclosure of a parent patent application.

Case Timeline

Date Event
2012-07-24 Earliest Priority Date for all Patents-in-Suit (U.S. Prov. App. 61/675,288)
2018-06-18 Alleged date of Defendants' awareness of parent patent application
2021-03-23 U.S. Patent No. 10,959,123 Issued
2022-11-29 U.S. Patent No. 11,516,694 Issued
2025-09-09 U.S. Patent No. 12,414,002 Issued
2026-05-20 Complaint Filing Date

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

U.S. Patent No. 10,959,123 - "Low Latency Wireless Messaging"

  • Patent Identification: U.S. Patent No. 10,959,123, "Low Latency Wireless Messaging," issued March 23, 2021 (the "'123 Patent").

The Invention Explained

  • Problem Addressed: The patent's background describes a market need for communication systems that favor low latency over high data throughput, noting that for some consumers, "a latency difference... of tens of microseconds could translate to revenue differences of millions of dollars" '123 Patent, col. 2:47-51 While radio waves offer faster propagation speeds than fiber optics, this advantage can be lost due to message processing delays and the reliability challenges of ionospheric transmission Compl. ¶¶27-29
  • The Patented Solution: The invention proposes a method for low-latency messaging over High Frequency (HF) bands using ionospheric refraction '123 Patent, fig. 1 The solution involves two key aspects: (1) encoding a message into a more compact format known in advance by the receiver to reduce "message size latency" '123 Patent, col. 5:10-24, and (2) determining and controlling physical-layer transmission parameters (like frequency, modulation type, and power) based on both message latency goals and predefined channel bandwidth constraints '123 Patent, col. 7:50-59 '123 Patent, col. 8:11-18
  • Technical Importance: This approach provided a framework for making inherently unreliable and low-bandwidth HF radio a viable, and potentially faster, alternative to fiber optics for time-critical, small-payload data applications like financial trading (Compl. ¶¶25; Compl. ¶40).

Key Claims at a Glance

  • The complaint asserts infringement of independent claim 1 Compl. ¶56
  • The essential elements of Claim 1 of the '123 Patent are:
    • Receiving a request for a particular action to be performed;
    • Encoding a particular value using a format derived to effect message latency into an encoded message, where the value is known a priori to the remote device;
    • Determining transmission parameters for the encoded message based at least on (a) message latency and (b) a predefined channel bandwidth; and
    • Transmitting the encoded message in the ionospheric HF band according to the determined parameters.
  • The complaint reserves the right to assert additional claims Compl. p. 14, n. 1

U.S. Patent No. 11,516,694 - "Low Latency Wireless Messaging"

  • Patent Identification: U.S. Patent No. 11,516,694, "Low Latency Wireless Messaging," issued November 29, 2022 (the "'694 Patent").

The Invention Explained

  • Problem Addressed: The '694 Patent addresses the same latency challenges in long-distance wireless communication as its parent, the '123 Patent '694 Patent, col. 2:42-51 It specifically focuses on the trade-off between the speed advantage of shortwave radio and its significant bandwidth limitations compared to fiber Compl. ¶50
  • The Patented Solution: The solution claimed in the '694 Patent is highly similar to the '123 Patent but adds an explicit limitation. It claims a method of encoding a "particular message" into an "encoded message" where the encoded version is definitively "smaller than the particular message" '694 Patent, claim 1 This reinforces the concept of data compression to reduce message size latency, a key component of minimizing overall end-to-end latency in a bandwidth-constrained environment '694 Patent, col. 5:15-24
  • Technical Importance: This patent explicitly claims the data-compression aspect of the latency reduction technique, making the invention's scope clearer with respect to message encoding efficiency.

Key Claims at a Glance

  • The complaint asserts infringement of independent claim 1 Compl. ¶78
  • The essential elements of Claim 1 of the '694 Patent are:
    • Receiving a request to transmit a particular message;
    • Encoding the particular message into an encoded message using a format derived to effect message latency, where the encoded message is known a priori to the remote device and is smaller than the particular message;
    • Determining transmission parameters based at least on (a) message latency and (b) a predefined channel bandwidth; and
    • Transmitting the encoded message over a frequency in the ionospheric HF band using the determined parameters.
  • The complaint reserves the right to assert additional claims Compl. p. 14, n. 1

U.S. Patent No. 12,414,002 - "Low Latency Wireless Messaging"

  • Patent Identification: U.S. Patent No. 12,414,002, "Low Latency Wireless Messaging," issued September 9, 2025 (the "'002 Patent").

Technology Synopsis

The '002 Patent continues the theme of low-latency RF transmission but refines the parameter selection step. It specifically claims selecting transmission parameters based on an estimated propagation latency and a predefined channel bandwidth Compl. ¶34 '002 Patent, claim 1 The patent further details that this estimation can be based on factors like time of day, solar cycle, number of ionospheric bounces, and distance Compl. ¶35

Asserted Claims

The complaint asserts infringement of independent claim 1 Compl. ¶100

Accused Features

The accused features are Defendants' HFT methods, which allegedly must account for propagation latency by selecting appropriate transmission parameters to ensure reliable, low-latency communication across global distances Compl. ¶¶110-111

III. The Accused Instrumentality

Product Identification

  • The accused instrumentalities are the methods, systems, and services used by the Defendants for High Frequency Trading (HFT) Compl. ¶39

Functionality and Market Context

  • The complaint alleges that Defendants operate as a coordinated group in the global HFT market, where speed is critical for "latency arbitrage"-capitalizing on price changes in one market before another market can react (Compl. ¶¶19; Compl. ¶40). To gain a competitive edge, Defendants are alleged to use shortwave radio communications in the High Frequency (HF) spectrum, which can propagate signals faster than fiber optic cables (Compl. ¶¶45; Compl. ¶51). The complaint identifies a specific antenna station in Elburn, Illinois, allegedly operated by Defendants, which is licensed to transmit in the HF spectrum and is physically located near the Chicago Mercantile Exchange (Compl. ¶¶49; Compl. ¶58). The complaint includes a map showing the antenna station's location relative to Chicago Compl. p. 16 The complaint alleges these methods involve tightly encoding trading data into small messages and transmitting them via ionospheric paths to remote locations where other trading exchanges are located (Compl. ¶¶51; Compl. ¶68). A photo provided in the complaint shows the antenna array allegedly used by Defendants Compl. p. 16

IV. Analysis of Infringement Allegations

'123 Patent Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Infringing Functionality Complaint Citation Patent Citation
A method for ionospheric Radio Frequency (RF) transmission of a message in a High Frequency (HF) band to a remote receiving device, the method comprising: receiving a request for a particular action to be performed; Defendants' HFT systems allegedly receive requests to execute trades (e.g., buy, sell) prior to transmitting a message. ¶61 col. 7:1-6
encoding a particular value using a format derived to effect message latency into an encoded message for transmission... wherein the particular value is known a priori to the remote receiving device... Defendants allegedly encode trading information (e.g., prices) into a few bytes or bits to reduce latency. The complaint alleges this encoded value is known to the remote receiving device to enable trade execution. ¶62; ¶63 col. 5:10-24
determining transmission parameters for transmission of the encoded message... based at least on (a) message latency and on (b) a predefined channel bandwidth; Defendants must allegedly determine parameters like modulation type and frequency to meet latency constraints for HFT. Their FCC licenses allegedly predefine channel bandwidth (e.g., "24K0" for 24 kHz). ¶64; ¶65; ¶66 col. 8:11-18
and transmitting the encoded message in the ionospheric HF frequency band according to the determined transmission parameters to the remote receiving device. Defendants allegedly transmit these encoded messages from their antenna station in Elburn, IL, using the HF band, to remote devices at overseas trading exchanges. ¶57; ¶58; ¶68 col. 10:35-45

'694 Patent Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Infringing Functionality Complaint Citation Patent Citation
A method for ionospheric Radio Frequency (RF) transmission... the method comprising: receiving a request to transmit a particular message to the remote receiving device; Defendants' HFT systems allegedly receive requests to transmit a trade message (e.g., a buy order) to a remote device. ¶83 col. 7:1-6
encoding the particular message using a format derived to effect message latency into an encoded message... wherein the encoded message is known a priori... and wherein the encoded message is smaller than the particular message; Defendants allegedly encode trading data into compact messages ("a few bytes or bits") because shortwave's limited bandwidth necessitates it. This encoding makes the transmitted message smaller than the original trading data. ¶84; ¶85 col. 5:15-24
determining transmission parameters... based at least on (a) message latency and on (b) a predefined channel bandwidth; The complaint alleges Defendants must select transmission parameters to meet latency needs for HFT and comply with predefined channel bandwidths (e.g., 24 kHz or 48 kHz) specified in their FCC licenses. ¶86; ¶87; ¶88 col. 8:11-18
and transmitting the encoded message over the frequency in the ionospheric HF frequency band using the determined transmission parameters. Defendants allegedly operate licensed antennas to transmit the encoded, smaller messages over the HF band to remote trading locations. ¶79; ¶80; ¶90 col. 10:35-45

Identified Points of Contention

  • Scope Questions: A central question may be the construction of "message latency" and "format derived to effect message latency." The patents describe latency as having both a "propagation delay" component and a "size component" '123 Patent, col. 14:14-19 The court will need to determine whether Defendants' alleged encoding and parameter selection practices are performed to "effect" both components as contemplated by the patents.
  • Technical Questions: A key evidentiary issue will be proving that Defendants "determine" their transmission parameters based on latency, as claimed. The complaint alleges this is a necessity for successful HFT Compl. ¶66, but does not provide direct evidence of the Defendants' decision-making process. The complaint provides an FCC license screenshot showing various authorized bandwidths, modulation types, and power levels, which may support the allegation that Defendants have parameters to select from Compl. p. 17

V. Key Claim Terms for Construction

  • The Term: "message latency"

  • Context and Importance: This term is at the heart of the patents and the infringement allegations. It appears in the key "determining transmission parameters" step of the asserted claims. The definition of what constitutes "message latency" under the patents will dictate what Plaintiff must prove Defendants are considering when they select their transmission parameters.

  • Intrinsic Evidence for Interpretation:

    • Evidence for a Broader Interpretation: The patent states the term "may include at least two components: message size latency and propagation latency" '123 Patent, col. 4:51-53, using the permissive term "may." This could support an argument that considering only one component (e.g., message size) is sufficient.
    • Evidence for a Narrower Interpretation: The specification provides detailed, distinct definitions for "message size latency" (related to the number of bits and processing time) and "propagation latency" (related to time-of-flight) '123 Patent, col. 4:54-67 '123 Patent, col. 5:41-52 A defendant could argue that to be "based on message latency," a system must consider both of these specifically defined components, not just a general desire for "speed."

  • The Term: "format derived to effect message latency"

  • Context and Importance: This term from the "encoding" step defines the required purpose of the message compression. The dispute may turn on whether any encoding that happens to reduce message size meets this limitation, or if the format itself must be specifically "derived" with the goal of affecting latency in the manner described in the patent. Practitioners may focus on this term because it links the act of encoding to a specific technical purpose.

  • Intrinsic Evidence for Interpretation:

    • Evidence for a Broader Interpretation: The specification states that encoding a message into fewer bits "may further reduce message size latency" and that this is "associated with a smaller message size" '123 Patent, col. 5:11-13 '123 Patent, col. 10:29-32 This could support an argument that any format resulting in fewer bits is inherently "derived to effect message latency."
    • Evidence for a Narrower Interpretation: The patent describes a specific example of encoding where a "buy 1,000 IBM" message is compressed into six bits, with each part of the message (security, transaction, quantity) mapped to a specific bit sequence '123 Patent, col. 5:13-20 A defendant may argue this implies a structured, pre-agreed format, not just any generic data compression.

VI. Other Allegations

  • Indirect Infringement: The complaint alleges active inducement, stating that the corporate parent Defendants actively control the subsidiary Defendants and that the Defendants act as agents for one another to perform the claimed steps Compl. ¶70 Compl. ¶71
  • Willful Infringement: Willfulness is alleged based on pre-suit knowledge. The complaint asserts that Defendants were aware of the patent family "on or around June 18, 2018" through an "express disclosure" of a parent application to an affiliated company Compl. ¶72 The complaint alleges that despite this awareness, Defendants continued to infringe, constituting objective recklessness Compl. ¶¶73-74 Similar allegations are made for the '694 Patent Compl. ¶¶94-96 and the '002 Patent Compl. ¶¶116-118

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

This case appears to hinge on questions of claim scope and evidentiary proof related to the sophisticated technology of high-frequency trading communications. The key questions for the court will likely be:

  • A central issue will be one of definitional scope: Does the term "message latency", as defined and used in the patents, require a system to actively consider and optimize for both the "message size" and "propagation" components of latency? Or is a general intent to be "fast," coupled with message compression, sufficient to meet the claim limitation?
  • A key evidentiary question will be one of demonstrating intent: Can the Plaintiff produce sufficient evidence to show that Defendants' selection of transmission parameters (e.g., frequency, modulation) is specifically "based on" the latency considerations required by the claims, rather than being based on other factors like signal reliability, regulatory compliance, or general best practices?
  • A third question relates to joint infringement: The complaint alleges a coordinated enterprise among multiple defendants. The viability of the infringement case may depend on whether the Plaintiff can prove that the actions of the various entities collectively satisfy all steps of the claimed methods and can be attributed to a single party or joint enterprise under the law.
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