Patent 10991097

Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

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Ownership chain (3)

Asserters network →

Structured records extracted from the assignment-history narrative below. Each entity links to its full ownership-network profile.

2020-08-03 · reel 053913/0890 · Assignment
YIP, STEPHEN; OSINSKI, Boleslaw; HO, Irvin; SHA, Lingdao TEMPUS LABS, INC.
Correspondent: · MCDONNELL BOEHNEN HULBERT & BERGHOFF
Transfer of inventor interests to the original assignee
2022-09-22 · reel 061144/0137 · Security Agreement
TEMPUS LABS, INC.ARES CAPITAL CORPORATION, AS COLLATERAL AGENT
Correspondent: · SIMPSON THACHER & BARTLETT
Securitization
2024-02-09 · reel 066744/0785 · Change of Name
TEMPUS LABS, INC.TEMPUS AI, INC.
Correspondent: · MCDONNELL BOEHNEN HULBERT & BERGHOFF
change of name only

Assignment history

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Inventors

Stephen Yip (Tempus Labs Inc)
Irvin Ho (Tempus Labs Inc)
Lingdao Sha (Tempus Labs Inc)
Boleslaw Osinski (Tempus Labs Inc)

All inventors were employees of the original assignee, Tempus Labs Inc, at the time of filing.

Original assignee

The original assignee, Tempus Labs Inc, is an operating company focused on artificial intelligence and precision medicine, including molecular and clinical data analysis for oncology. They ship products embodying the claims, specifically AI-powered diagnostic and treatment selection tools that analyze tissue images. Tempus Labs Inc changed its name to Tempus AI, Inc. on February 9, 2024, and continues to operate under that new name.

Assignment timeline

2020-08-03 (executed) / recorded 2020-08-03 — Reel 053913/0890
- Conveyance: Assignment
- Assignor: YIP, STEPHEN; OSINSKI, Boleslaw; HO, Irvin; SHA, Lingdao
- Assignee: TEMPUS LABS, INC.
- Correspondent: MCDONNELL BOEHNEN HULBERT & BERGHOFF LLP, 300 SOUTH WACKER DRIVE, SUITE 3200, CHICAGO, ILLINOIS, UNITED STATES, 60606
- Context: Transfer of inventor interests to the original assignee.
2022-09-22 (executed) / recorded 2022-09-22 — Reel 061144/0137
- Conveyance: Security Interest
- Assignor: TEMPUS LABS, INC.
- Assignee: ARES CAPITAL CORPORATION, AS COLLATERAL AGENT
- Correspondent: SIMPSON THACHER & BARTLETT LLP, 425 LEXINGTON AVENUE, NEW YORK, NEW YORK, UNITED STATES, 10017
- Context: Securitization of assets, likely for financing.
2024-02-09 (executed) / recorded 2024-02-09 — Reel 066744/0785
- Conveyance: Change of Name
- Assignor: TEMPUS LABS, INC.
- Assignee: TEMPUS AI, INC.
- Correspondent: MCDONNELL BOEHNEN HULBERT & BERGHOFF LLP, 300 SOUTH WACKER DRIVE, SUITE 3200, CHICAGO, ILLINOIS, UNITED STATES, 60606. This correspondent also appears on the 2020-08-03 assignment.
- Context: Corporate name change.

Timeline diagram

timeline
    title Ownership of US 10991097
    2019 : Filed by Tempus Labs Inc
    2020 : Inventor Assignment to Tempus Labs Inc
    2021 : Issued to Tempus Labs Inc
    2022 : Security Interest to Ares Capital Corp
    2024 : Name Change to Tempus AI Inc
    2025 : First infringement suit filed
    2026 : IPR filed by Unified Patents

NPE / troll-pattern signals

Shell-entity transfer — not present. The assignees (Tempus Labs Inc / Tempus AI, Inc. and Ares Capital Corporation) are recognized operating companies or financial institutions.
Known asserter in the chain — not present. None of the assignees (Tempus Labs Inc / Tempus AI, Inc., Ares Capital Corporation) are known NPEs. Unified Patents is a petitioner in an IPR, which is an anti-NPE action, not an asserter.
Repeat correspondent across the chain — present. MCDONNELL BOEHNEN HULBERT & BERGHOFF LLP appears as the correspondent on both the 2020-08-03 assignment (Reel 053913/0890) and the 2024-02-09 change of name (Reel 066744/0785).
Cascading transfers — not present. There are no multiple consecutive assignments through chained LLCs within a short timeframe.
Pre-litigation transfer — not present. The assignment to Tempus Labs Inc from the inventors occurred in August 2020. The first infringement suit was filed in March 2025. The security interest filing in September 2022 and the name change in February 2024 are not indicative of pre-litigation transfer for assertion.
Bankruptcy fire-sale — not present. There is no indication of bankruptcy proceedings for Tempus Labs Inc or Tempus AI, Inc.
Privateering — unclear. There is no information in the provided patent text or assignment records to suggest a privateering arrangement.
Defensive aggregator (anti-NPE) — present. Unified Patents has filed an IPR against the patent, indicating an action taken by a defensive aggregator to challenge the patent's validity.

Verdict

Operating-company assertion. The patent is currently held by Tempus AI, Inc., which is an operating company that develops products related to the patent's claims. While Unified Patents (a defensive aggregator) has filed an IPR, this action challenges the patent rather than indicating an NPE assertion. The repeated correspondent for Tempus-related filings suggests internal consistency rather than a shell-entity pattern. The litigation filed in district courts by Tempus AI, Inc. (as Plaintiff) against Guardant Health Inc further supports this, as Guardant Health Inc is a competitor in the precision medicine and diagnostics space.

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

Generated 5/28/2026, 12:46:44 AM