Dynamuse LLC v. Sirius XM Radio Inc

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: DynaMuse LLC (New Mexico)
  • Defendant: Sirius XM Radio Inc. (Delaware)
  • Plaintiff's Counsel: Rabicoff Law LLC; Crewse Law Firm, PLLC
• Case Identification: 3:26-cv-00803, N.D. Tex., 03/12/2026
• Venue Allegations: Plaintiff alleges venue is proper in the Northern District of Texas because Defendant has an established place of business in the district and has committed alleged acts of infringement there.
• Core Dispute: Plaintiff alleges that Defendant's products and services infringe a patent related to a system for searching across multiple media playlists to identify those containing specific media content.
• Technical Context: The technology addresses the organization and searching of digital media collections, a key challenge for users of online music services and personal libraries.
• Key Procedural History: The complaint does not mention any prior litigation, licensing history, or post-grant proceedings related to the patent-in-suit.

Case Timeline

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

U.S. Patent No. 10,491,646 - "Mechanism for facilitating user-controlled features relating to media content in multiple online media communities and networks"

• Patent Identification: U.S. Patent No. 10,491,646, "Mechanism for facilitating user-controlled features relating to media content in multiple online media communities and networks," issued November 26, 2019.

The Invention Explained

• Problem Addressed: The patent describes a problem for users who have numerous digital media playlists, where it is difficult to remember which playlists contain a specific song or media file without manually searching through each one individually '646 Patent, col. 1:56-64
• The Patented Solution: The invention is a method and system that automates this search process '646 Patent, col. 2:20-25 A user selects a media item (e.g., a song), and a "playlist assistance" mechanism receives this request, researches a plurality of media playlists across different media communities, identifies which playlists contain the item, and transmits a list of those specific playlists back to the user '646 Patent, abstract '646 Patent, col. 2:25-33 The system is designed to eliminate the "traditional laborious method of manually going through each and every playlist to find the media content" '646 Patent, col. 4:20-22
• Technical Importance: The described technology aims to improve the user experience for managing large, distributed collections of digital media by providing a centralized search function that works across disparate playlists and services '646 Patent, col. 1:40-44

Key Claims at a Glance

The complaint does not specify which claims are asserted, instead incorporating them by reference to an external exhibit not provided with the complaint Compl. ¶11 Compl. ¶16 Independent claim 1 is representative of the patented method.

Independent Claim 1:

• A computer-implemented method for facilitating user-controlled features relating to media content in media communities, the method performed by a media management device hosting a media management mechanism and having a processing device coupled to memory, the method comprising:
• facilitating, by the media management device, displaying of an interactive user interface while playing a media item at a media-enabled computing device, wherein the media item comprises an audio item or a video item; and
• facilitating, by the media management device, selecting of a playlist assistance function using the user interface at the media-enabled computing device, wherein the playlist assistance function to facilitate locating, identifying, and displaying of results based on search criteria associated with media items...

III. The Accused Instrumentality

Product Identification

• The complaint identifies the accused instrumentalities as "at least the Defendant products identified in the charts" referred to as the "Exemplary Defendant Products" Compl. ¶11 The complaint does not name any specific Sirius XM products, services, or applications.

Functionality and Market Context

• The complaint alleges that the accused products "practice the technology claimed by the '646 Patent" Compl. ¶16 It does not provide any specific technical details about how the accused Sirius XM products function. It broadly alleges that these products have been "made, used, sold, imported, and offered for sale by Defendant and/or its customers" Compl. ¶11

IV. Analysis of Infringement Allegations

The complaint alleges infringement but incorporates the specific comparisons into an external "Exhibit 2," which was not provided Compl. ¶16 Compl. ¶17 Therefore, a detailed claim chart summary cannot be constructed.

The complaint's narrative theory of infringement is that unspecified "Exemplary Defendant Products" practice the patented technology and "satisfy all elements of the Exemplary '646 Patent Claims" Compl. ¶16 The infringement is alleged to be direct, either literally or under the doctrine of equivalents, and is said to occur when Defendant makes, uses, sells, or imports the products, or when its employees internally test and use them Compl. ¶11 Compl. ¶12

No probative visual evidence provided in complaint.

• Identified Points of Contention:
  • Scope Questions: A central question may be whether the functionality offered by Defendant's streaming radio and on-demand services constitutes the "selecting of a playlist assistance function" as claimed. The dispute may focus on whether a general search feature within a service performs the specific locating, identifying, and displaying steps recited in the claim for the purpose of finding playlists.
  • Technical Questions: A technical question for the court could be whether the accused products actually "research[...] a plurality of media playlists at a plurality of media communities" as described in the patent '646 Patent, abstract or if their functionality is confined to a single, proprietary ecosystem, potentially creating a mismatch with the claim's scope.

V. Key Claim Terms for Construction

The complaint does not provide sufficient detail for analysis of specific claim terms. However, based on the patent's focus, the following term may be central to the dispute.

• The Term: "playlist assistance function" (from claim 1)
• Context and Importance: This term appears to be the core of the invention. Its construction will likely determine whether the accused products, which presumably offer some form of media search or library organization, fall within the scope of the claims. Practitioners may focus on whether the term requires a dedicated, user-selectable tool for finding playlists, or if it can be read more broadly to cover any feature that helps a user find media within a playlist.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The abstract describes the invention as "mechanisms and methods for facilitating playlist assistance," suggesting a broad functional definition rather than a specific software component '646 Patent, abstract The "Brief Description of the Drawings" also refers generally to a "mechanism for facilitating user-controlled features" '646 Patent, col. 1:60-63
  • Evidence for a Narrower Interpretation: The specification repeatedly references a specific software implementation named "Playlist Assist®" '646 Patent, col. 4:2, which "displays every playlist that includes any particular/selected track" '646 Patent, col. 1:16-18 This could support an argument that the "function" is limited to the specific tool-based embodiment described, which is activated to find all playlists containing a currently playing or selected song.

VI. Other Allegations

• Indirect Infringement: The complaint alleges induced infringement, stating that Defendant distributes "product literature and website materials inducing end users" to use its products in a manner that infringes the '646 Patent Compl. ¶14 The knowledge element is alleged to be met "at least since being served by this Complaint" Compl. ¶15
• Willful Infringement: The complaint alleges that Defendant has "actual knowledge" of its infringement based on the service of the complaint and the attached claim charts Compl. ¶13 It alleges that despite this knowledge, Defendant continues to infringe, providing a basis for a claim of post-suit willful infringement Compl. ¶14

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

• A core issue will be one of definitional scope: can the term "playlist assistance function," which the patent describes as a specific tool for finding all playlists containing a given song, be construed to cover the more general search and library features of a modern streaming media service?
• A key evidentiary question will be one of technical operation: does the complaint, which relies on an unprovided exhibit, plausibly allege facts showing that Defendant's products perform the specific claimed steps of researching across a "plurality of media playlists" and returning a list of those playlists, or is there a fundamental mismatch between the patent's cross-community search concept and the operation of the accused products within a closed ecosystem?
• A procedural question may arise concerning the sufficiency of the pleadings: given that all detailed infringement allegations are incorporated by reference from an external document, the initial stages of the case may involve disputes over whether the complaint itself provides the defendant with adequate notice of the specific infringement theory as required by federal pleading standards.