Patent 5115326

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.

  1. 1991-01-07 · reel 005822/0831 · Assignment

    BURGESS, KEN L., MARVIN, JOHN S.HEWLETT-PACKARD COMPANY, A CORP. OF CA

    Transfer from inventors to original assignee

  2. 2001-01-16 · reel 011406/0047 · Merger

    HEWLETT-PACKARD COMPANYHEWLETT-PACKARD COMPANY

    Correspondent: JOHN B. HAMLIN

    Internal reorganization / name change

  3. 2015-11-01 · recorded 2016-02-19 · reel 035651/0157 · Assignment

    HEWLETT-PACKARD COMPANYHP INC.

    Correspondent: BLAKELY S. PRATT · HP INC.

    Corporate separation of Hewlett-Packard Company into HP Inc. and Hewlett Packard Enterprise

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.

✓ Generated

Inventors

No unusual patterns detected regarding inventor departures.

Original assignee

Hewlett Packard Co. was the original assignee. Hewlett-Packard was a prominent operating company in the computer and electronics industry, and it is highly likely that they shipped products embodying the claims, given their business in printers, computers, and related technologies. As of today, HP Inc. (a successor to Hewlett-Packard Co. after its 2015 split) is an operating company.

Assignment timeline

  • 1991-01-07 (executed) / recorded 1991-01-07 — Reel 005822/0831
    • Conveyance: Assignment
    • Assignor: BURGESS, KEN L., MARVIN, JOHN S.
    • Assignee: HEWLETT-PACKARD COMPANY, A CORP. OF CA
    • Correspondent: NOT LISTED
    • Context: Transfer from inventors to original assignee
  • 2001-01-16 (executed) / recorded 2001-01-16 — Reel 011406/0047
    • Conveyance: Merger
    • Assignor: HEWLETT-PACKARD COMPANY
    • Assignee: HEWLETT-PACKARD COMPANY
    • Correspondent: JOHN B. HAMLIN
    • Context: Internal reorganization / name change (Merger activity noted in Google Patents legal events).
  • 2015-11-01 (executed) / recorded 2016-02-19 — Reel 035651/0157

Timeline diagram

timeline
    title Ownership of US 5115326
    1990 : Filed by Hewlett Packard Co
    1991 : Inventors assigned to Hewlett-Packard
    1992 : Issued
    2001 : Internal reorganization
    2015 : Assigned to HP Inc

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. All recorded assignees are operating companies (Hewlett-Packard Company, HP Inc.).
  2. Known asserter in the chain — not present. No known NPEs or patent asserters appear in the assignment chain.
  3. Repeat correspondent across the chain — unclear. While John B. Hamlin and Blakely S. Pratt appear as correspondents for Hewlett-Packard entities, there isn't enough information to determine if they are repeat players across multiple unrelated NPE assertion chains tracked on this site.
  4. Cascading transfers — not present. There are no multiple consecutive assignments through chained LLCs in a short timeframe.
  5. Pre-litigation transfer — not present. No litigation was found involving this patent.
  6. Bankruptcy fire-sale — not present. The transfers appear to be part of normal corporate restructuring.
  7. Privateering — not present. There is no indication of transfers to an NPE for assertion on behalf of an operating company.
  8. Defensive aggregator (anti-NPE) — not present. The chain ends with HP Inc., an operating company.

Verdict

Insufficient data. While the patent is currently owned by an operating company (HP Inc.), there is no evidence to suggest either NPE assertion or defensive aggregation. The transfers are consistent with corporate restructuring.

Generated 5/30/2026, 12:45:50 AM