Eight Sleep Inc v. Somnus Lab

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Eight Sleep, Inc. (Delaware)
  • Defendant: Somnus Lab (Sweden) and Raynewood AB (Sweden)
  • Plaintiff's Counsel: Wilson Sonsini Goodrich & Rosati, P.C.
• Case Identification: 2:25-cv-01011, E.D. Tex., 10/06/2025
• Venue Allegations: Venue is alleged to be proper under 28 U.S.C. § 1391(c)(3) on the basis that both Defendants are foreign entities.
• Core Dispute: Plaintiff alleges that Defendants' Sleep Pad, a smart mattress cover, infringes three patents related to biometric sensing and dynamic temperature regulation for sleep optimization.
• Technical Context: The technology operates in the consumer "sleep tech" market, which focuses on using data and automation to actively improve sleep quality rather than just providing a passive sleep surface.
• Key Procedural History: The complaint alleges that Defendants were sent a notice letter regarding the infringement of the Asserted Patents on September 29, 2025, which may be used to support allegations of willful infringement.

Case Timeline

Date	Event
2014-06-05	Priority Date for '461', '240', and '339' Patents
2020-10-06	'461' Patent Issue Date
2024-08-XX	Somnus Lab Founded
2025-07-29	'339' Patent Issue Date
2025-08-05	'240' Patent Issue Date
2025-09-29	Notice Letter Sent to Defendants
2025-10-XX	Accused Product Deliveries Expected to Begin
2025-10-06	Complaint Filing Date

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

U.S. Patent No. 10,792,461 - "Methods and Systems for Gathering and Analyzing Human Biological Signals"

Issued October 6, 2020.

The Invention Explained

• Problem Addressed: The patent's background section describes the limitations of prior art sleep technologies, such as electric blankets, which require manual operation and do not provide functionality beyond basic warming. '461 Patent, col. 1:63-2:4
• The Patented Solution: The invention is a system that uses sensors integrated into a bed device to gather a user's biological signals (e.g., heart rate, temperature). A processor analyzes these signals to identify the user and regulate the bed's temperature based on that specific user's identity and associated stored data, thereby personalizing the sleep environment. '461 Patent, abstract '461 Patent, col. 20:1-10
• Technical Importance: This technology enabled an automated, personalized approach to sleep thermoregulation, moving beyond static or manually adjusted systems by dynamically responding to an individual's biometrics. Compl. ¶20

Key Claims at a Glance

• The complaint asserts at least independent claim 1. Compl. ¶33
• Essential elements of Claim 1 include:
  • A system for regulating the temperature of a bed device.
  • At least one sensor in the bed device to detect a user's biological signal.
  • A temperature control device to regulate the bed's temperature.
  • A processor communicatively coupled to the sensor and temperature control device.
  • The processor is configured to identify the user from a plurality of users based on the biological signal and regulate temperature based on the user's identity.
  • Biological signal data for identifying each user is stored for access by said processor.

U.S. Patent No. 12,377,240 - "Methods and Systems for Gathering and Analyzing Human Biological Signals"

Issued August 5, 2025.

The Invention Explained

• Problem Addressed: The patent addresses the need for individualized temperature control for multiple users sharing the same bed. '240 Patent, background, col. 1:36-2:4
• The Patented Solution: The invention describes a method and system for dual-zone temperature control. It involves obtaining separate biological signals from two users in adjacent zones of a bed, generating distinct temperature instructions for each zone based on each user's specific preferences, and sending those instructions to the temperature control hardware to heat or cool the zones differently. '240 Patent, claim 1
• Technical Importance: This innovation provided a direct solution for partners sharing a bed to each have an independently optimized and personalized sleep temperature throughout the night. Compl. ¶27

Key Claims at a Glance

• The complaint asserts at least system claim 29, which depends on method claim 1. Compl. ¶46
• Essential elements of Claim 1 include:
  • A method for operating a bed device.
  • Obtaining a first biological signal from a first user in a first zone.
  • Obtaining a second biological signal from a second user in an adjacent second zone.
  • Generating control signals to set different temperatures for the first and second zones, where each instruction is based at least in part on a user-specified preference for the respective user.
  • Sending the control signals to a temperature control device to heat or cool the zones differently.

U.S. Patent No. 12,370,339 - "Methods and Systems for Gathering and Analyzing Human Biological Signals"

Issued July 29, 2025.

Technology Synopsis

This patent describes a method for operating a bed device by obtaining an initial biological signal to detect a user's presence, determining a control signal to turn the device on and set a first temperature based on the user's bedtime, and then obtaining a second, different biological signal while the device is on to adjust the temperature. This allows for automated pre-conditioning of the bed and dynamic adjustments during sleep. '339 Patent, claim 1

Asserted Claims

The complaint asserts at least system claim 29, which depends on method claim 1. Compl. ¶61 Compl. ¶63

Accused Features

The accused features are the Somnus Lab Sleep Pad's "Bedtime & Wake-Up Scheduling" and "Temperature Blocks Scheduling," which allegedly pre-condition the bed and adjust temperature in phases throughout the night based on user settings and presence. Compl. ¶66

III. The Accused Instrumentality

Product Identification

The accused product is the "Sleep Pad" system, which includes a mattress pad and a base unit, offered by Defendant Somnus Lab. Compl. ¶25

Functionality and Market Context

The Sleep Pad is described as an "intelligent temperature system that adapts in real time," offering dual-zone heating and cooling with a range of 12-42°C per side. Compl. ¶25 Its key functionalities, as alleged in the complaint, include "Somnus Insight," a "wearable-free" biometric monitoring feature that tracks heart rate, respiration, HRV, and motion via sensors in the pad. Compl. ¶27 Compl. Ex. 23 The system also features "Stage-aware comfort" to adjust temperatures based on sleep stage and a "Gentle Thermal Alarm." Compl. ¶27 Compl. Ex. 23 The complaint alleges the product is offered for pre-order to U.S. customers via the Somnus Lab website, with deliveries expected to begin in October 2025. Compl. ¶25 Compl. ¶26 An image from the complaint shows the Accused Product, consisting of a base unit and a pad. Compl. p. 9

IV. Analysis of Infringement Allegations

'461 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A system for regulating a temperature of a portion of a bed device, comprising:	The Accused Product is described as an "advanced temperature-regulating sleep system."	¶35	col. 20:50-51
at least one sensor that is a part of said bed device... configured to detect a biological signal of a user...	The "Somnus Insight" feature uses "hidden sensors" within the pad to track biological signals like heart rate, respiration, HRV, and motion without wearables.	¶36	col. 5:8-14
a temperature control device operatively coupled to said portion of said bed device... configured to regulate said temperature...	The Accused Product combines "precise cooling and heating" via its pad and base unit, which can be controlled manually or through a smart app.	¶37	col. 5:16-19
a processor... configured to identify said user from a plurality of users... based on said biological signal, and regulate said temperature... based on said user's identity,	The "Somnus Lab App" is alleged to be the processor, which provides "dual-zone control" and "personalized temp curves" so "each sleeper gets their perfect temperature." This allegedly allows for regulation based on each user's identity.	¶38	col. 5:1-6
wherein biological signal data to identify each user of said plurality of users is stored for access by said processor...	The complaint alleges the system stores biological signal data to identify users, citing the app's function to "monitor sleep data" and provide "personalized temp curves." Screenshots show app interfaces for two different users, "Jack" and "Sally."	¶39; ¶22	col. 20:7-10

'240 Patent Infringement Allegations

Claim Element (from Independent Claim 29 via Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A sleep system comprising a processor and a memory... storing instructions for the processor to implement the method of claim 1.	The Accused Product is alleged to be a system with a processor and memory, citing its ability to process signals locally, use backend services, and retain settings during network disconnections.	¶54	col. 24:48-52
obtaining at least one first biological signal from a first user... on a first zone of the bed device;	The "Somnus Insight" feature allegedly obtains biological signals from a first user on one side of the bed via sensors in the pad.	¶50	col. 24:49-52
obtaining at least one second biological signal from a second user... on a second zone of the bed device adjacent the first zone;	The system's "dual-zone precision" feature is alleged to obtain biological signals from a second user on the other side of the bed.	¶51	col. 24:53-56
generating a plurality of control signals... to set the temperature of the first zone... and... the second zone... differently... wherein the... instruction is based at least in part on a... user-specified preference...	The complaint alleges the Somnus Lab App adjusts temperatures for two users independently based on each user's preferences, citing features like "scheduled temperature curves" and "AI-driven personalization." A complaint exhibit shows separate temperature controls for "Jack Side A" and "Sally Side B."	¶52; ¶22	col. 24:57-67
sending the plurality of control signals to at least one respective temperature control device... such that the first and second zones are heated or cooled differently...	The system is alleged to send control signals to the heating/cooling hardware to effect the different temperatures for each zone.	¶53	col. 24:68-25:3

• Identified Points of Contention:
  • Scope Questions: A potential issue for the '461' patent is the scope of "identify said user." The court may need to determine if assigning settings to a fixed zone (e.g., "Side A") based on detecting the presence of a user is equivalent to positively "identifying" a specific person from a "plurality of users" and applying settings based on that unique "identity," as required by the claim.
  • Technical Questions: For the '240' patent, a question may arise regarding the "user-specified preference" limitation. The analysis will question whether the accused system's "AI-driven personalization" falls within this scope, or if the term requires a more direct and explicit user input, such as setting a specific temperature, rather than an algorithmic adaptation based on learned behavior.

V. Key Claim Terms for Construction

• Term: "identify said user ... based on said biological signal" '461 Patent, Claim 1

• Context and Importance: This term is central to the personalization aspect of the '461' patent. The infringement theory hinges on whether the accused system's ability to apply different settings for two sleepers meets this "identification" requirement. Practitioners may focus on this term because the strength of the infringement case depends on whether differentiating between "User A" and "User B" is equivalent to "identifying" them based on biometrics.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The specification states the technology "identifies the users based on any of the following signals alone or in combination: heart rate, breathing rate, body motion, or body temperature associated with each user" '461 Patent, col. 19:65-20:2 This could be argued to support any process that uses biometrics to distinguish between users, even if just by their location in the bed.
  • Evidence for a Narrower Interpretation: The claim requires identification "from a plurality of users" and regulation "based on said user's identity" where "biological signal data to identify each user... is stored." '461 Patent, claim 1 This language may suggest a more robust process of matching a detected biometric signature to a specific, stored user profile, rather than simply applying settings to a zone where a user is detected.

• Term: "user-specified preference" '240 Patent, Claim 1

• Context and Importance: The definition of this term is critical because the complaint alleges infringement based on features including "scheduled temperature curves" and "AI-driven personalization." Compl. ¶52 Whether the AI feature, which adapts over time, constitutes a "user-specified" preference will be a key point of contention.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The specification notes that a processor determines a control signal based on inputs including "user-specified preferences, exercise data... or the environment properties received." '240 Patent, col. 5:3-6 This broad list of potential inputs may support an interpretation where preferences can be specified implicitly through user actions that the AI learns from.
  • Evidence for a Narrower Interpretation: The specification also states, "the desired temperature may be specified by the user." '240 Patent, col. 8:14-15 This phrasing, along with the common understanding of "specify," may support a narrower interpretation requiring a direct, affirmative user input, such as entering a number into an app, which may not cover adaptations made by an AI algorithm.

VI. Other Allegations

• Indirect Infringement: The complaint alleges both induced and contributory infringement for all asserted patents. (Compl. ¶40; Compl. ¶41). The allegations for inducement are based on Defendants publishing and providing "specifications, studies, instruction manuals, support materials, marketing materials, and user guide manuals" that allegedly instruct customers on how to use the infringing functionalities. Compl. ¶41 Compl. ¶56 Compl. ¶73
• Willful Infringement: Willfulness is alleged for all asserted patents based on both pre- and post-suit knowledge. Compl. ¶42 Compl. ¶57 Compl. ¶74 Pre-suit knowledge is alleged based on a notice letter sent to Defendants on September 29, 2025. Compl. ¶30 The complaint further alleges willful blindness, arguing that the "striking resemblance" and "uncanny" similarity between the parties' products and mobile applications should have prompted a reasonable company to investigate Eight Sleep's patent portfolio before launching its product. Compl. ¶29 This is supported by a visual comparison of the two companies' app interfaces. Compl. p. 15

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

• A core issue will be one of definitional scope: does the act of assigning settings to a fixed zone of a bed (e.g., "Side A") based on detected biometrics satisfy the claim requirement to "identify said user" and apply settings based on that specific user's "identity," or does the claim require a more robust, person-specific authentication process?
• A second key question will be one of technical evidence: does the accused product's "AI-driven personalization" operate based on learned user inputs that can be fairly characterized as a "user-specified preference," or does it function as a generalized algorithm that does not meet this claim limitation? The resolution will likely depend on evidence detailing the inner workings of the accused system's software.
• A third central question will concern willfulness: given the complaint's detailed allegations of copying, supported by side-by-side visual comparisons of the products' mobile applications, the court will likely focus on whether Defendants' actions constituted willful infringement or willful blindness, particularly in light of the alleged pre-suit notice.