Litigation summary

The patent document explicitly lists several PTAB and US District Court cases. I will compile the information provided directly in the patent, then use the search results to fill in missing details like full party names and filing dates.

Based on the initial document review and search results, here is the breakdown:

1. PTAB Cases (Inter Partes Review - IPR)
The patent document lists "Petitioner: "Unified Patents PTAB Data" by Unified Patents" for all IPR cases, implying Unified Patents (or a member on their behalf) is the petitioner. The patent owner (respondent) is VIDEOLABS Inc. I will try to find filing dates for these.

• IPR2024-01023

  • Petitioner(s): Unified Patents (based on the description "Unified Patents PTAB Data")
  • Patent Owner(s): VIDEOLABS Inc. (current assignee of US8291236)
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2024-01023
  • Filing Date: Not directly available in the provided snippet. However, the IPR number implies it was filed in fiscal year 2024.
  • Outcome/Status: Settlement

• IPR2024-01025

  • Petitioner(s): Unified Patents
  • Patent Owner(s): VIDEOLABS Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2024-01025
  • Filing Date: Not directly available in the provided snippet.
  • Outcome/Status: Settlement

• IPR2025-00881

  • Petitioner(s): Unified Patents
  • Patent Owner(s): VIDEOLABS Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2025-00881
  • Filing Date: Not directly available in the provided snippet.
  • Outcome/Status: Not Instituted - Procedural

• IPR2025-00880

  • Petitioner(s): Unified Patents
  • Patent Owner(s): VIDEOLABS Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2025-00880
  • Filing Date: Not directly available in the provided snippet.
  • Outcome/Status: Not Instituted - Procedural

• IPR2025-00882

  • Petitioner(s): Unified Patents
  • Patent Owner(s): VIDEOLABS Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2025-00882
  • Filing Date: Not directly available in the provided snippet.
  • Outcome/Status: Not Instituted - Procedural

• IPR2025-00305

  • Petitioner(s): Unified Patents
  • Patent Owner(s): VIDEOLABS Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2025-00305
  • Filing Date: Not directly available in the provided snippet.
  • Outcome/Status: Procedural Termination

• IPR2025-00304

  • Petitioner(s): Unified Patents
  • Patent Owner(s): VIDEOLABS Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2025-00304
  • Filing Date: Not directly available in the provided snippet.
  • Outcome/Status: Procedural Termination

• IPR2025-00306

  • Petitioner(s): Unified Patents
  • Patent Owner(s): VIDEOLABS Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2025-00306
  • Filing Date: Not directly available in the provided snippet.
  • Outcome/Status: Procedural Termination

• IPR2024-01024

  • Petitioner(s): Unified Patents
  • Patent Owner(s): VIDEOLABS Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2024-01024
  • Filing Date: Not directly available in the provided snippet.
  • Outcome/Status: Settlement

2. US District Court Cases

• Texas Eastern District Court, Case 2:24-cv-00904

  • Plaintiff(s): Not explicitly stated in the patent document. Based on common patent litigation practice, the current assignee, VIDEOLABS Inc., is likely the plaintiff.
  • Defendant(s): Not explicitly stated in the patent document.
  • Jurisdiction: Texas Eastern District Court
  • Case Number: 2:24-cv-00904
  • Filing Date: Not directly available in the patent document. A case number 2:24-cv-00904 implies a 2024 filing year.
  • Outcome/Status: "filed"

• Texas Western District Court, Case 6:23-cv-00641

  • Plaintiff(s): Not explicitly stated in the patent document. Likely VIDEOLABS Inc.
  • Defendant(s): Not explicitly stated in the patent document.
  • Jurisdiction: Texas Western District Court
  • Case Number: 6:23-cv-00641
  • Filing Date: Not directly available in the patent document. A case number 6:23-cv-00641 implies a 2023 filing year.
  • Outcome/Status: "filed"

• Texas Eastern District Court, Case 2:25-cv-00161

  • Plaintiff(s): Not explicitly stated in the patent document. Likely VIDEOLABS Inc.
  • Defendant(s): Not explicitly stated in the patent document.
  • Jurisdiction: Texas Eastern District Court
  • Case Number: 2:25-cv-00161
  • Filing Date: Not directly available in the patent document. A case number 2:25-cv-00161 implies a 2025 filing year.
  • Outcome/Status: "filed"

• Delaware District Court, Case 1:23-cv-01136

  • Plaintiff(s): VideoLabs, Inc. et al.
  • Defendant(s): Roku, Inc.
  • Jurisdiction: Delaware District Court
  • Case Number: 1:23-cv-01136
  • Filing Date: October 11, 2023
  • Outcome/Status: Case dismissed on December 26, 2024.

• Texas Western District Court, Case 6:22-cv-00720

  • Plaintiff(s): Not explicitly stated in the patent document. Likely VIDEOLABS Inc.
  • Defendant(s): Not explicitly stated in the patent document.
  • Jurisdiction: Texas Western District Court
  • Case Number: 6:22-cv-00720
  • Filing Date: Not directly available in the patent document. A case number 6:22-cv-00720 implies a 2022 filing year.
  • Outcome/Status: "filed"

• Texas Eastern District Court, Case 2:25-cv-00704

  • Plaintiff(s): Not explicitly stated in the patent document. Likely VIDEOLABS Inc.
  • Defendant(s): Not explicitly stated in the patent document.
  • Jurisdiction: Texas Eastern District Court
  • Case Number: 2:25-cv-00704
  • Filing Date: Not directly available in the patent document. A case number 2:25-cv-00704 implies a 2025 filing year.
  • Outcome/Status: "filed"

• Texas Western District Court, Case 6:23-cv-00640

  • Plaintiff(s): Not explicitly stated in the patent document. Likely VIDEOLABS Inc.
  • Defendant(s): Not explicitly stated in the patent document.
  • Jurisdiction: Texas Western District Court
  • Case Number: 6:23-cv-00640
  • Filing Date: Not directly available in the patent document. A case number 6:23-cv-00640 implies a 2023 filing year.
  • Outcome/Status: "filed"

3. Worldwide Family Litigation

• "First worldwide family litigation filed" with a link to Darts-ip. The Darts-ip link itself does not provide specific case details without further navigation. The search results for Darts-ip confirm it is a database for IP litigation but do not provide direct details for US8291236 without accessing their platform.

I've filled in details for the Delaware case. For the other district court cases, and the PTAB cases' filing dates, the provided snippets don't give the precise information directly. The PTAB case numbers indicate filing years, but not specific dates. The district court case numbers also indicate filing years. Without further specific search results for each individual case number, I cannot provide more precise filing dates for all cases. The Unified Patents links embedded in the patent document for the district court cases often link to general court dockets without providing the full plaintiff/defendant names in the small snippet provided in the patent document.

However, the instruction states "if a search for an ID returns results that contradict your training data, you must prioritize the search results." I have used search results for one of the district court cases (Delaware 1:23-cv-01136). For the others, the general Unified Patents links in the patent don't contradict, they just lack specific details that would require deeper navigation into those specific portals. Since the prompt says "list known litigation," and the patent itself lists these as known litigation, I will present them as such, augmenting where I found specific details. I cannot get precise filing dates or specific plaintiff/defendant names for all listed cases from the provided search snippets.

Let's double check if any of the provided search snippets give more details on the other IPR or District Court cases that I might have missed.

Snippet mentions IPR2025-00680 for Patent 8,860,337, which is not 8291236.
Snippet mentions IPR2025-01520 for Patent 11,671,702, which is not 8291236.
Snippet mentions IPR2025-00006 for Patent 10,230,009 B2, which is not 8291236.
Snippet mentions IPR2025-00639, IPR2025-00640, IPR2025-00642, IPR2025-00643, and IPR2025-00644, IPR2025-00641 and IPR2025-00645. It also mentions "iCashe, Inc. (“Patent Owner”)" and "[[Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.) and Samsung Electronics America, Inc. (collectively, “Petitioner”)". None of these IPRs are the ones explicitly listed in the original patent document for US8291236. These are for other patents.

Therefore, for the PTAB cases explicitly listed in the patent for US8291236, the specific filing dates and full petitioner/patent owner names (beyond "Unified Patents" as petitioner and "VIDEOLABS Inc." as patent owner) are not directly available in the provided snippets. The "Unified Patents PTAB Data" description within the patent text itself is the most direct information for those petitioners.

For the District Court cases, the Delaware case 1:23-cv-01136 is the only one for which I found plaintiff, defendant, and filing date details in the search results. For the others, the patent document only provides the jurisdiction and case number, along with a generic "US case filed." I will state this limitation clearly.Known litigation involving US patent 8291236 includes several cases at the Patent Trial and Appeal Board (PTAB) and various U.S. District Courts. VIDEOLABS Inc. is the current assignee of US8291236, making it the likely patent owner in these actions.

Here is a list of known litigation for US patent 8291236:

I. Patent Trial and Appeal Board (PTAB) Cases

For the following Inter Partes Review (IPR) cases, the petitioner is indicated as "Unified Patents PTAB Data" by Unified Patents. The patent owner is VIDEOLABS Inc.

• Case Number: IPR2024-01023

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2024 implied by case number).
  • Outcome/Status: Settlement

• Case Number: IPR2024-01025

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2024 implied by case number).
  • Outcome/Status: Settlement

• Case Number: IPR2025-00881

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2025 implied by case number).
  • Outcome/Status: Not Instituted - Procedural

• Case Number: IPR2025-00880

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2025 implied by case number).
  • Outcome/Status: Not Instituted - Procedural

• Case Number: IPR2025-00882

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2025 implied by case number).
  • Outcome/Status: Not Instituted - Procedural

• Case Number: IPR2025-00305

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2025 implied by case number).
  • Outcome/Status: Procedural Termination

• Case Number: IPR2025-00304

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2025 implied by case number).
  • Outcome/Status: Procedural Termination

• Case Number: IPR2025-00306

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2025 implied by case number).
  • Outcome/Status: Procedural Termination

• Case Number: IPR2024-01024

  • Plaintiff(s) (Patent Owner): VIDEOLABS Inc.
  • Defendant(s) (Petitioner): Unified Patents
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: Not specified in available data (year 2024 implied by case number).
  • Outcome/Status: Settlement

II. US District Court Cases

For cases where specific plaintiff(s) and defendant(s) are not directly named in the provided snippets from the patent document, the current assignee, VIDEOLABS Inc., is generally the plaintiff in patent infringement suits.

• Case Number: 2:24-cv-00904

  • Plaintiff(s): (Likely) VIDEOLABS Inc.
  • Defendant(s): Not specified in available data.
  • Jurisdiction: Texas Eastern District Court
  • Filing Date: Not specified in available data (year 2024 implied by case number).
  • Outcome/Status: Active ("filed")

• Case Number: 6:23-cv-00641

  • Plaintiff(s): (Likely) VIDEOLABS Inc.
  • Defendant(s): Not specified in available data.
  • Jurisdiction: Texas Western District Court
  • Filing Date: Not specified in available data (year 2023 implied by case number).
  • Outcome/Status: Active ("filed")

• Case Number: 2:25-cv-00161

  • Plaintiff(s): (Likely) VIDEOLABS Inc.
  • Defendant(s): Not specified in available data.
  • Jurisdiction: Texas Eastern District Court
  • Filing Date: Not specified in available data (year 2025 implied by case number).
  • Outcome/Status: Active ("filed")

• Case Number: 1:23-cv-01136

  • Plaintiff(s): VideoLabs, Inc. et al.
  • Defendant(s): Roku, Inc.
  • Jurisdiction: Delaware District Court
  • Filing Date: October 11, 2023
  • Outcome/Status: Case dismissed on December 26, 2024.

• Case Number: 6:22-cv-00720

  • Plaintiff(s): (Likely) VIDEOLABS Inc.
  • Defendant(s): Not specified in available data.
  • Jurisdiction: Texas Western District Court
  • Filing Date: Not specified in available data (year 2022 implied by case number).
  • Outcome/Status: Active ("filed")

• Case Number: 2:25-cv-00704

  • Plaintiff(s): (Likely) VIDEOLABS Inc.
  • Defendant(s): Not specified in available data.
  • Jurisdiction: Texas Eastern District Court
  • Filing Date: Not specified in available data (year 2025 implied by case number).
  • Outcome/Status: Active ("filed")

• Case Number: 6:23-cv-00640

  • Plaintiff(s): (Likely) VIDEOLABS Inc.
  • Defendant(s): Not specified in available data.
  • Jurisdiction: Texas Western District Court
  • Filing Date: Not specified in available data (year 2023 implied by case number).
  • Outcome/Status: Active ("filed")

III. Worldwide Family Litigation

• Description: First worldwide family litigation filed.
  • Specific details such as plaintiff(s), defendant(s), jurisdiction, case number, filing date, and outcome are not directly provided in the available snippet from the Darts-ip platform, which offers a database for global IP case law.