DISH Tech LLC v. Dazn US LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: DISH Technologies L.L.C. and Sling TV L.L.C. (Colorado)
  • Defendant: Dazn US LLC (Delaware)
  • Plaintiff's Counsel: Ashby & Geddes
• Case Identification: 1:26-cv-00604, D. Del., 05/26/2026
• Venue Allegations: Venue is alleged to be proper in the District of Delaware because Defendant DAZN US LLC is organized under the laws of the State of Delaware.
• Core Dispute: Plaintiff alleges that Defendant's online sports streaming platform infringes five U.S. patents related to foundational adaptive bitrate (ABR) streaming technology.
• Technical Context: ABR technology is a core component of modern internet video delivery, enabling services to dynamically adjust streaming quality based on a user's network conditions to ensure uninterrupted playback.
• Key Procedural History: The complaint highlights that the asserted patents, part of a portfolio acquired from MOVE Networks, have been subject to extensive prior litigation and administrative review. Notably, U.S. Patent No. 10,469,554 was previously found valid and infringed in an International Trade Commission (ITC) action against other streaming providers. The complaint also discloses that all five asserted patents have faced multiple Inter Partes Review (IPR) challenges at the Patent Trial and Appeal Board (PTAB), and that certain claims of the '772, '138, and '554 patents are currently on appeal at the U.S. Court of Appeals for the Federal Circuit following PTAB decisions, which raises the question of the continued validity of those claims.

Case Timeline

Date	Event
2003-01-01	MOVE Networks, Inc. founded
2004-04-30	Earliest Priority Date for all Asserted Patents
2010-12-01	EchoStar acquires MOVE and ABR Patent portfolio
2014-10-21	'772 Patent Issued
2015-01-01	DISH launches Sling TV streaming service
2019-11-05	'554 Patent Issued
2022-10-11	'138 Patent Issued
2023-03-23	ITC Commission Opinion finds infringement of '554 Patent in a separate action
2023-06-13	'798 Patent Issued
2024-05-21	'234 Patent Issued
2026-05-26	Complaint Filing Date

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

U.S. Patent No. 11,991,234, Apparatus, system, and method for multi-bitrate content streaming, Issued 05/21/2024

The Invention Explained

• Problem Addressed: The patent addresses the shortcomings of early internet streaming, where content delivery was often unreliable, low-quality, and costly compared to traditional cable or satellite TV Compl. ¶¶19-20 Early methods struggled to match video resolution to network bandwidth, leading to poor user experiences Compl. ¶20 Compl. ¶23
• The Patented Solution: The invention describes a client-side, HTTP-based adaptive bitrate (ABR) streaming method Compl. ¶22 A media file is encoded into multiple versions at different bitrates, and each version is broken into small, individually requestable segments called "streamlets" Compl. ¶24 A client device monitors its own network performance and "pulls" the appropriate streamlet from a server, switching between higher and lower quality versions as network conditions change to ensure continuous playback (Compl. ¶¶22; Compl. ¶26). This client-driven approach avoids the need for specialized, proprietary servers by using the standard HTTP/TCP protocol Compl. ¶26
• Technical Importance: This client-side "pull" architecture using standard internet protocols was a key development that enabled reliable, high-quality, large-scale video streaming over the public internet without costly, specialized infrastructure Compl. ¶27

Key Claims at a Glance

• The complaint asserts independent method claim 12 Compl. ¶50
• The essential elements of claim 12 include:
  • A method executable by a client device for outputting rate-adaptive streams.
  • Receiving digital content from a server where multiple copies at different bit rates are stored as individually-requestable portions ("streamlets").
  • The client device requests a plurality of sequential portions.
  • The client device automatically requests subsequent portions from one of the different copies based on successive determinations to change the bit rate.
  • This automatic requesting includes repeatedly generating a factor indicative of the client's current ability to receive the content, with the factor relating to network performance.
  • The successive determinations to change the bit rate are based on this factor.
• The complaint reserves the right to supplement its analysis based on claim construction and further developments Compl. p. 15, fn. 1

U.S. Patent No. 8,868,772, Apparatus, system, and method for multi-bitrate content streaming, Issued 10/21/2014

The Invention Explained

• Problem Addressed: The patent family addresses the problem that internet streaming historically "sacrifices quality compared with downloading a file of the same content" '772 Patent, col. 1:52-54 and was vulnerable to network failures and congestion '772 Patent, col. 2:9-10
• The Patented Solution: The invention is a method for presenting rate-adaptive streams where a media player on an end-user station streams video from servers storing multiple copies of the video at different bitrates '772 Patent, abstract The video is stored as multiple files, each having a time index, allowing the media player to automatically request subsequent portions and shift between higher and lower quality copies based on factors related to network performance '772 Patent, abstract '772 Patent, col. 4:1-17
• Technical Importance: This method allows a media player to achieve continuous playback using the highest quality stream sustainable at a given time, improving the user experience over prior, less reliable streaming methods Compl. ¶22

Key Claims at a Glance

• The complaint asserts independent method claim 1 Compl. ¶69
• The essential elements of claim 1 include:
  • A method for presenting rate-adaptive streams.
  • Streaming by a media player on an end user station a video from servers, where multiple copies of the video at different bit rates are stored as multiple files.
  • Each file has a time index, and files for the same portion of video across different copies have the same time index.
  • Requesting by the media player a plurality of sequential files of one copy over TCP connections based on the time indexes.
  • Automatically requesting by the media player subsequent portions of the video from one of the copies, dependent upon successive determinations to shift playback quality.
  • This automatic requesting includes repeatedly generating a set of factors indicative of the ability to sustain streaming, where the factors relate to network performance.
  • Making successive determinations to shift quality to achieve continuous playback using the highest quality copy determined to be sustainable.
• The complaint notes that certain claims of the '772 Patent are on appeal and reserves the right to assert claims that are confirmed or restored Compl. ¶69

U.S. Patent No. 11,677,798 - Apparatus, system, and method for multi-bitrate content streaming

• Patent Identification: U.S. Patent No. 11,677,798, "Apparatus, system, and method for multi-bitrate content streaming," Issued 06/13/2023 Compl. ¶10
• Technology Synopsis: This patent claims a server-side process for streaming. It involves storing a plurality of streams (including first, second, and third bit rate streams) as groups of "streamlets," where at least one stream is encoded at no less than 600 kbps. The server receives requests from end-user stations and sends the requested streamlet based on the end user's determination to select a higher or lower bit rate version Compl. ¶86
• Asserted Claims: Independent claim 22 Compl. ¶86
• Accused Features: The complaint alleges that DAZN's servers and content delivery endpoints infringe by storing multiple streams (e.g., bandwidth variants 280482, 479032, and 5678503), with at least one exceeding 600 kbps, and responding to streamlet requests from end-user stations that are making ABR decisions Compl. ¶87

U.S. Patent No. 11,470,138 - Apparatus, system, and method for multi-bitrate content streaming

• Patent Identification: U.S. Patent No. 11,470,138, "Apparatus, system, and method for multi-bitrate content streaming," Issued 10/11/2022 Compl. ¶11
• Technology Synopsis: This patent claims a system for ABR streaming. The system includes a storage device storing video encoded at low, medium, and high bitrates (with at least one stream at no less than 600 kbps), where the first streamlet of each stream has the same duration and encodes the same portion of the video. It further includes a web server configured to receive streamlet requests from end users based on their bitrate selection, and to retrieve and send the requested streamlet Compl. ¶105
• Asserted Claims: Independent claim 1 and dependent claim 8 Compl. ¶105
• Accused Features: The complaint alleges DAZN's streaming system infringes by storing video at multiple bitrates (including 280482, 479032, and 5678503), aligning streamlets, and using a web server to field requests from and deliver streamlets to end users Compl. ¶106

U.S. Patent No. 10,469,554 - Apparatus, system, and method for multi-bitrate content streaming

• Patent Identification: U.S. Patent No. 10,469,554, "Apparatus, system, and method for multi-bitrate content streaming," Issued 11/05/2019 Compl. ¶12
• Technology Synopsis: This patent claims a system specifically for ABR streaming of live event video. The system comprises a storage device storing the live video encoded into low, medium, and high quality streams (with at least one at no less than 600 kbps). It also includes a web server configured to receive and fulfill streamlet requests from end users based on their bitrate selections Compl. ¶124
• Asserted Claims: At least dependent claim 7 (which depends on independent claim 1) Compl. ¶124
• Accused Features: The complaint alleges infringement by DAZN's system for delivering live sporting events. This system is alleged to use a storage device storing live video encoded at multiple bitrates (including an 826045 and 5794355 bandwidth variant) with aligned streamlets, and a web server that handles streamlet requests from end users Compl. ¶125

III. The Accused Instrumentality

Product Identification

The accused instrumentality is Defendant's online sports streaming platform, collectively referred to as the "Accused Streaming Services." This includes the DAZN Application, the DAZN Site (www.dazn.com), and DAZN Server(s) Compl. ¶34 Compl. ¶42

Functionality and Market Context

The Accused Streaming Services distribute live and on-demand sports content to subscribers and one-time purchasers Compl. ¶42 The service allegedly operates using the HTTP Live Streaming (HLS) protocol for ABR streaming Compl. ¶44 This involves encoding video content at multiple bitrates and storing it as individually requestable segments (or "streamlets") on servers, including content delivery network (CDN) endpoints Compl. ¶44 Client devices running the DAZN application or accessing the DAZN site execute HLS instructions to request these segments, allowing playback quality to adapt to network conditions Compl. ¶44 The complaint alleges this has enabled DAZN to build a "large-scale online sports streaming and video platform" Compl. ¶45

No probative visual evidence provided in complaint.

IV. Analysis of Infringement Allegations

'234 Patent Infringement Allegations

Claim Element (from Independent Claim 12)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A method executable by a client device to output rate-adaptive streams received via at least one transmission control protocol (TCP) connection with at least one server over a network...	Client devices receive digital content from DAZN's servers via at least one TCP connection.	¶51	col. 6:44-49
...wherein multiple different copies of the digital content encoded at different bit rates are stored as individually-requestable portions on the at least one server...	DAZN stores multiple copies of digital content as individually-requestable portions ("streamlets") encoded at different bit rates (e.g., 280482, 479032, and 5678503 bandwidth variants).	¶51	col. 7:46-54
...requesting by the client device a plurality of sequential individually-requestable portions of one of the copies from the at least one server;	Client devices request a plurality of sequential individually-requestable portions of one of the copies.	¶51	col. 13:20-22
automatically requesting by the client device from the at least one server subsequent portions of the digital content by requesting for each such portion one of the individually-requestable portions from one of the copies dependent upon successive determinations by the client device to change a requested bit rate...	Client devices automatically request subsequent portions from higher or lower bit rate copies dependent upon successive determinations to change the requested bit rate.	¶51	col. 17:42-49
...the automatically requesting including repeatedly generating a factor indicative of a current ability to receive the digital content...wherein the factor relates to a performance of the network; and	The client device repeatedly generates a factor indicative of the current ability to receive digital content, relating to network performance.	¶51	col. 17:10-21
making the successive determinations whether to change the requested bit rate based on the factor...	The client device makes successive determinations to change the requested bit rate based on the generated factor, requesting from a higher bit rate copy when the factor exceeds a first threshold or from a lower bit rate copy when it falls below a second threshold.	¶51	col. 18:2-9
arranging the individually-requestable portions requested from the at least one server in order of ascending presentation time for output to a presentation device.	The client device arranges the requested portions in order of ascending presentation time for output.	¶51	col. 13:30-33

• Identified Points of Contention:
  • Scope Question: A potential dispute may arise over whether the term "factor indicative of a current ability to receive the digital content" as claimed in the patent can be read to cover the specific metrics and decision logic used by DAZN's client-side HLS implementation, which is a standardized protocol.
  • Technical Question: The complaint alleges the generation of a "factor" but provides limited detail on how DAZN's system technically calculates this factor beyond relating it to "network performance" Compl. ¶51 The evidence required to prove that DAZN's client-side logic performs the specific steps of generating this factor and comparing it to thresholds as claimed will be a key issue.

'772 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A method for presenting rate-adaptive streams...streaming by a media player...a video from a set of one or more servers, wherein each of a plurality of different copies of the video encoded at different bit rates is stored as multiple files on the set of servers...	A media player on an end user station streams video from DAZN's servers, where multiple copies of the video are stored as multiple files at different bit rates (e.g., 280482, 479032, and 5678503 bandwidth variants).	¶70	col. 4:1-10
...each of said files having a time index such that the files whose playback is the same portion of the video for each of the different copies have the same time index...	Each file allegedly has a time index.	¶70	col. 4:11-17
requesting by the media player a plurality of sequential ones of the files of one of the copies from the set of servers over a plurality of Transmission Control Protocol (TCP) connections based on the time indexes;	The media player requests a plurality of sequential files over TCP connections based on the time indexes.	¶70	col. 5:29-33
automatically requesting by the media player...subsequent portions of the video by requesting for each such portion one of the files from one of the copies dependent upon successive determinations by the media player to shift the playback quality...	The media player automatically requests subsequent portions from different copies based on successive determinations to shift playback quality.	¶70	col. 5:45-56
...said automatically requesting including repeatedly generating a set of one or more factors indicative of the current ability to sustain the streaming of the video...wherein the set of one or more factors relate to the performance of the network;	The process includes repeatedly generating factors indicative of the ability to sustain streaming, relating to network performance.	¶70	col. 6:13-19
making the successive determinations to shift the playback quality based on at least one of the set of factors to achieve continuous playback of the video using the files of the highest quality one of the copies determined sustainable at that time;	Successive determinations are made to shift playback quality to achieve continuous playback using the highest quality copy determined to be sustainable.	¶70	col. 6:20-25

• Identified Points of Contention:
  • Scope Question: The claim requires that "files across the different copies" that "yield the same portions of the video" have the "same time index." A dispute may arise over whether the segment numbering, playlist tags, or other metadata in DAZN's HLS implementation constitutes the claimed "time index" structure.
  • Legal/Procedural Question: The complaint explicitly states that certain claims of the '772 Patent are on appeal at the Federal Circuit following a PTAB decision Compl. ¶69 A central question for this count is whether the asserted claims will survive appellate review and remain enforceable.

V. Key Claim Terms for Construction

For the '234 Patent

• The Term: "factor indicative of a current ability to receive the digital content"
• Context and Importance: This term is central to the client-side intelligence of the claimed method. Its scope determines what types of network performance measurements and calculations constitute infringement. Practitioners may focus on this term because the infringement allegation hinges on whether DAZN's standard HLS implementation generates a "factor" that meets the patent's definition.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The claim language states the factor "relates to a performance of the network" '234 Patent, cl. 12 The specification describes monitoring "time intervals between successive receive times for each requested streamlet response" '554 Patent, col. 17:12-14, which could support a broad interpretation covering various forms of throughput or latency measurement.
  • Evidence for a Narrower Interpretation: The specification discloses a specific "performance ratio r" and an averaged "performance factor φ" calculated using a geometric mean '554 Patent, col. 17:22-41 A party could argue that the term "factor" should be limited to this specific mathematical embodiment or a close equivalent.

For the '772 Patent

• The Term: "time index"
• Context and Importance: The claim requires that files corresponding to the same portion of video have the "same time index," which is foundational to how the system organizes and requests segments. Infringement depends on whether the structure of DAZN's HLS playlists and media segments maps onto this claimed "time index" system.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification describes the concept broadly, stating that a streamlet has a "unique time index in relation to the beginning of the content" '772 Patent, col. 4:11-14 This could be argued to cover any sequential numbering or timing metadata.
  • Evidence for a Narrower Interpretation: Figure 2c and the accompanying text describe a specific structure where streamlets are numbered sequentially (0, 1, 2...) and correspond to distinct time intervals (e.g., streamlet 1 has a time index of 00:02) '772 Patent, Fig. 2c '772 Patent, col. 4:3-7 A party may argue the term is limited to this explicit file-naming or indexing convention.

VI. Other Allegations

• Indirect Infringement: The complaint alleges both inducement and contributory infringement for all five patents. The inducement allegations are based on DAZN allegedly designing its ABR services to operate in an infringing manner and providing instructions and documentation to end users and CDN operators that encourage the infringing use (e.g., Compl. ¶¶55-56; Compl. ¶¶74-75). The contributory infringement allegations assert that the Accused Streaming Services are a material part of the inventions, are especially made or adapted for infringement, and have no substantial non-infringing use (e.g., Compl. ¶¶64-65; Compl. ¶¶81-82).
• Willful Infringement: The complaint alleges pre-suit knowledge of the patents, forming the basis for willfulness. This knowledge is purportedly based on DAZN's operation in a specialized market, DISH's virtual patent marking page (www.dish.com/ip/), and DAZN's alleged monitoring of DISH's enforcement and licensing activities, including a widely publicized ITC Action involving the '554 patent (e.g., Compl. ¶¶46-48; Compl. ¶¶59-60; Compl. ¶77). The complaint also pleads willful blindness in the alternative for each patent (e.g., Compl. ¶60; Compl. ¶78).

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

1. A threshold issue will be one of patent validity: given that claims of the '772, '138, and '554 patents are currently on appeal from adverse PTAB decisions, will the asserted claims of those patents survive Federal Circuit scrutiny and remain enforceable for the duration of this case?
2. A central infringement question will be one of technical and definitional scope: does the standardized client-side logic in DAZN's HLS-based streaming service perform the specific function of "repeatedly generating a factor indicative of a current ability to receive the digital content" as required by the '234 patent and its associated specification, or is there a fundamental mismatch in technical operation?
3. A key factual question for damages will be one of pre-suit knowledge: can DISH prove that DAZN had actual knowledge of all five asserted patents prior to the lawsuit, sufficient to support a claim for willful infringement, based on circumstantial evidence such as virtual patent marking and a prior ITC action on only one of the five patents?