Assignment history

Inventors

• Kourosh Soroushian (DivX LLC at time of filing)

Original assignee

The original assignee named on the issued patent is DivX LLC. DivX LLC's primary line of business has historically been focused on video compression technologies and digital media solutions, including codecs, software, and tools for playing back high-quality video. As of 2026, DivX LLC appears to be an active operating company, continuing to develop and license video technology.

Assignment timeline

• 2021-06-07 (executed) / recorded 2021-06-07 — Reel 058090/0858

  • Conveyance: Assignment
  • Assignor: Divx, LLC
  • Assignee: SONIC IP, INC.
  • Correspondent: David S. Level, ESQ., 2033 Gateway Place, Suite 500, San Jose, CA 95110.
  • Context: Internal reorg

• 2021-06-07 (executed) / recorded 2021-06-07 — Reel 058090/0859

  • Conveyance: Assignment
  • Assignor: SONIC IP, INC.
  • Assignee: DIVX CF HOLDINGS LLC
  • Correspondent: David S. Level, ESQ., 2033 Gateway Place, Suite 500, San Jose, CA 95110. This correspondent recurs in this chain.
  • Context: Internal reorg

• 2021-06-07 (executed) / recorded 2021-06-07 — Reel 058090/0860

  • Conveyance: Change of Name
  • Assignor: DIVX CF HOLDINGS LLC
  • Assignee: DIVX, LLC
  • Correspondent: David S. Level, ESQ., 2033 Gateway Place, Suite 500, San Jose, CA 95110. This correspondent recurs in this chain.
  • Context: Change of name

• 2021-06-07 (executed) / recorded 2021-06-07 — Reel 058090/0861

  • Conveyance: Assignment
  • Assignor: SOROUSHIAN, KOUROSH
  • Assignee: DIVX, LLC
  • Correspondent: David S. Level, ESQ., 2033 Gateway Place, Suite 500, San Jose, CA 95110. This correspondent recurs in this chain.
  • Context: Assignment from inventor to company

Timeline diagram

timeline
    title Ownership of US 11611785
    2011 : Priority date
    2021 : Filed by Divx LLC
         : Assigned to SONIC IP INC
         : Assigned to DIVX CF HOLDINGS LLC
         : Name changed to DIVX LLC
         : Assigned from inventor to DIVX LLC
    2023 : Issued
    2024 : District Court case filed 3:24-cv-00818
         : District Court case filed 1:24-cv-02061
    2025 : PTAB case IPR2025-01223 filed

NPE / troll-pattern signals

1. Shell-entity transfer — not present. While there are transfers between similarly named entities (Divx, SONIC IP, DIVX CF HOLDINGS), these appear to be internal reorganizations within the DivX corporate structure, as evidenced by the immediate re-assignment back to DivX, LLC and the consistent correspondent.

2. Known asserter in the chain — not present. None of the assignees (DivX LLC, SONIC IP INC, DIVX CF HOLDINGS LLC) are listed on common public NPE lists. Unified Patents is a petitioner in IPR2025-01223, but Unified Patents is an anti-NPE defensive aggregator, not an asserter.

3. Repeat correspondent across the chain — present. David S. Level, ESQ., with the firm and address 2033 Gateway Place, Suite 500, San Jose, CA 95110, is listed as the correspondent for all four recorded assignments on 2021-06-07 (Reel 058090/0858, 058090/0859, 058090/0860, and 058090/0861).

4. Cascading transfers — present. There are four consecutive assignments and a change of name recorded on the same date (2021-06-07) for this patent family (Reel 058090/0858, 058090/0859, 058090/0860, 058090/0861), indicating a rapid series of transfers. This, coupled with the same correspondent, suggests an internal restructuring or preparation for future transactions.

5. Pre-litigation transfer — unclear. The transfers occurred in June 2021. The district court cases were filed in 2024. While there is a gap, the series of transfers could be preparatory for later assertion. Without a precise filing date for the 2024 litigation, it's hard to definitively state if it falls within a 6-month window.

6. Bankruptcy fire-sale — not present. There is no indication of bankruptcy filings by DivX LLC or any entity in the assignment chain.

7. Privateering — unclear. There's no public information in the patent record or Google Patents that suggests DivX LLC is engaged in privateering activities with this patent.

8. Defensive aggregator (anti-NPE) — not present (as an assignee). While Unified Patents filed an IPR against this patent, they are a petitioner, not an assignee, indicating an attempt to challenge the patent rather than acquire it defensively.

Verdict

Operating-company assertion
The assignment chain predominantly reflects internal corporate reorganizations and transfers within DivX LLC, an operating company in the video technology space. The recurrent correspondent and cascading transfers are consistent with a company managing its IP portfolio, possibly in preparation for licensing or enforcement, rather than a transfer to a shell NPE. The subsequent district court litigation suggests an assertion by the operating company.

USPTO Assignment Center search: https://assignmentcenter.uspto.gov/