Assignment history

Inventors

• Koulick Ghosh: Employed by Splunk Inc. at the time of filing.
• George Tsironis: Employed by Splunk Inc. at the time of filing.
  No unusual patterns, such as inventors departing the original assignee within 12 months of filing, were observed.

Original assignee

The original assignee is Splunk Inc..
Splunk Inc. is a software company that produces software for indexing, searching, and analyzing machine-generated data, creating dashboards, alerts, graphs, and reports to monitor system health and detect and respond to issues in real-time. Their primary line of business focuses on cybersecurity and observability solutions, including products like Splunk Enterprise and Splunk Cloud Platform. These products embody the claims of US 11875275 related to custom time series models in computer analytics systems.
Splunk Inc. was acquired by Cisco Systems for $28 billion in March 2024 and now operates as a subsidiary of Cisco Systems. Its current status is an operating subsidiary of Cisco Technology, Inc..

Assignment timeline

• 2023-02-21 (executed) / recorded 2023-02-22 — Reel 062024/0255

  • Conveyance: ASSIGNMENT
  • Assignor: TSIRONIS, GEORGE; GHOSH, KOULICK
  • Assignee: SPLUNK INC.
  • Correspondent: BAKER BOTTS L.L.P., 2001 ROSS AVENUE, SUITE 2200, DALLAS, TX 75201-2980
  • Context: Initial assignment from inventors to their employer.

• 2025-07-22 (executed) / recorded 2025-07-22 — Reel 066345/0365

  • Conveyance: CHANGE OF NAME
  • Assignor: SPLUNK INC.
  • Assignee: SPLUNK LLC
  • Correspondent: FENWICK & WEST LLP, SILICON VALLEY CENTER, 801 CALIFORNIA STREET, MOUNTAIN VIEW, CA 94041. This correspondent also appears on the subsequent assignment.
  • Context: Internal corporate name change as part of a larger acquisition.

• 2025-07-22 (executed) / recorded 2025-07-22 — Reel 066345/0369

  • Conveyance: ASSIGNMENT
  • Assignor: SPLUNK LLC
  • Assignee: CISCO TECHNOLOGY, INC.
  • Correspondent: FENWICK & WEST LLP, SILICON VALLEY CENTER, 801 CALIFORNIA STREET, MOUNTAIN VIEW, CA 94041. This correspondent also appears on the preceding change of name.
  • Context: Transfer of ownership to Cisco Technology, Inc. as part of the acquisition of Splunk by Cisco Systems.

Timeline diagram

timeline
    title Ownership of US 11875275
    2019 : Priority Date
    2023 : Application filed by Splunk Inc
         : Inventors assign to Splunk Inc
    2024 : Patent granted
    2025 : Splunk Inc becomes Splunk LLC
         : Splunk LLC assigns to Cisco Tech Inc

NPE / troll-pattern signals

1. Shell-entity transfer — Not present. The patent was transferred between established operating companies: Splunk Inc. (later Splunk LLC) and Cisco Technology, Inc., both of which actively develop and sell products relevant to the patent's claims. The change of name from Splunk Inc. to Splunk LLC (Reel 066345/0365) was an internal corporate event, not a transfer to a shell entity.
2. Known asserter in the chain — Not present. Neither Splunk Inc. (Splunk LLC) nor Cisco Technology, Inc. are identified as known patent assertion entities (NPEs) or listed on public NPE directories.
3. Repeat correspondent across the chain — Present. FENWICK & WEST LLP appears as the correspondent for both the "CHANGE OF NAME" from SPLUNK INC. to SPLUNK LLC (Reel 066345/0365) and the subsequent "ASSIGNMENT" from SPLUNK LLC to CISCO TECHNOLOGY, INC. (Reel 066345/0369), both recorded on 2025-07-22. This indicates consistent legal representation during the Splunk acquisition by Cisco.
4. Cascading transfers — Not present. While there were two records on the same day (2025-07-22), they represent a change of name followed by an assignment as part of a single acquisition event, not a series of consecutive transfers through different LLCs.
5. Pre-litigation transfer — Unclear. Google Patents indicates "Family has litigation" and "PTAB case IPR2026-00263 filed (Pending)", but the precise date of the "First worldwide family litigation filed" is not available to determine if the assignment to Cisco Technology, Inc. (executed 2025-07-22) occurred within six months prior.
6. Bankruptcy fire-sale — Not present. Splunk Inc. was acquired by Cisco Systems, Inc., not sold due to bankruptcy.
7. Privateering — Not present. The transfer is a direct acquisition of an operating company by another operating company, not a transfer to an NPE to assert on behalf of the original owner.
8. Defensive aggregator (anti-NPE) — Not present. The current assignee is Cisco Technology, Inc., a commercial operating company, not a defensive aggregator such as RPX or AST.

Verdict

Operating-company assertion
The patent chain shows a clear progression of ownership from the original operating company, Splunk Inc., to another major operating company, Cisco Technology, Inc.. The assignments recorded on Reel 066345/0365 and 066345/0369 on 2025-07-22 document the corporate name change of Splunk Inc. to Splunk LLC, followed by the assignment to Cisco Technology, Inc. as part of Cisco's acquisition of Splunk. Both companies are known for developing and shipping products related to the patent's claims.

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