Invalidity dossier
US 11080001
Added 5/12/2026, 11:41:53 PM
⚖️ 1 PTAB proceeding on file for this patent
— Inter Partes Review, Post-Grant Review, or Covered Business Method proceedings at the USPTO Patent Trial and Appeal Board.
Got a demand letter citing US 11080001?
Paste the full letter into the analyzer. We extract every asserted patent (this one and any others), characterize the asserter, flag validity vulnerabilities, and draft a sample response letter your attorney can adapt.
Generic sample response letter (PDF)
Generates a draft reply letter to a generic infringement claim citing this patent, using the analysis below. For a response tailored to a specific letter you received, use the demand letter analyzer instead. Sample only — not legal advice. Do not send without review by a licensed patent attorney.
Watchlist
Get alerted when this patent moves.
Email-only, free, anonymous. We'll notify you when US 11080001 gets a new lawsuit, a new PTAB proceeding, or a new dossier section. One-click unsubscribe from any alert.
Active provider: Google · gemini-2.5-pro
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
{"answer":"Here is a summary of U.S. Patent 11,080,001.
Title: Concurrent transmission and playback of audio information
Assignee: Sonos Inc
Inventors: Nicholas A. J. Millington
Filing Date: April 17, 2013
Issue Date: August 3, 2021
Abstract:
A system for synchronizing operations among a plurality of devices that have independent clocking arrangements. The system includes a task distribution device that sends tasks to a synchrony group of devices that are to perform the tasks in unison. The task distribution device assigns each task with a time stamp that indicates a time, relative to a clock maintained by the task distribution device, at which the members of the synchrony group are to execute the task. Each member of the synchrony group periodically obtains the current time from the task distribution device's clock and determines a time differential between the task distribution device's clock and its own clock. It then determines a time at which, according to its respective clock, the time stamp indicates that it is to execute the task.
Plain-Language Summary of Independent Claims:
Independent Claim 1: A method for a master device in a group of media playback devices to transfer its master role to another device in the group. The method involves the master device sending a message to a slave device, which includes information about the audio being played, its own network address, and the network address of the audio source.
Independent Claim 13: A tangible, non-transitory, computer-readable medium with instructions for a master device to transfer its role. These instructions cause the device to send a message to a slave device containing information about the audio being played, the master device's network address, and the network address of the audio source.
Independent Claim 14: A playback device that can act as a master device in a group of playback devices. It includes a network interface, a processor, and memory with instructions to send a message to a slave device containing audio information, its own network address, and the audio source's network address, to transfer the master role.
Disclaimer: I do not have access to real-time data from the U.S. Court of Appeals for the Federal Circuit (CAFC) dockets. A search of publicly available legal databases did not yield any specific litigation information for US Patent 11,080,001 in the CA-FC 2026 dockets as of today's date."}
Generated 5/12/2026, 11:43:47 PM