Patent 8589587

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 (10)

Asserters network →

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

  1. 2007-05-11 · reel 019484/0488 · Assignment of Assignors Interest

    MARTI, FELIX A.; EIRIKSSON, ASGEIR THOR; MICHAILIDIS, DIMITRIOS; NOUREDDINE, WAELCHELSIO COMMUNICATIONS, INC.

    Correspondent: Jeffrey A. Bergman · Bergman & Song

    Original assignment from inventors to Chelsio Communications, Inc.

  2. 2014-03-19 · reel 032227/0268 · Security Interest

    CHELSIO COMMUNICATIONS, INC.EAST WEST BANK

    Correspondent: Scott W. Johnson · Law Offices of Scott W. Johnson

    Grant of security interest by Chelsio Communications to East West Bank.

  3. 2014-10-21 · reel 032890/0734 · Release By Secured Party

    EAST WEST BANKCHELSIO COMMUNICATIONS, INC.

    Correspondent: Scott W. Johnson · Law Offices of Scott W. Johnson

    Release of security interest by East West Bank to Chelsio Communications, Inc.

  4. 2014-10-21 · reel 032890/0736 · Security Interest

    CHELSIO COMMUNICATIONS, INC.SILICON VALLEY BANK

    Correspondent: Scott W. Johnson · Law Offices of Scott W. Johnson

    Grant of new security interest by Chelsio Communications to Silicon Valley Bank.

  5. 2016-07-15 · reel 037568/0871 · Release By Secured Party

    EAST WEST BANKCHELSIO COMMUNICATIONS, INC.

    Correspondent: Christopher P. King · Jones Day

    Release of a security interest by East West Bank to Chelsio Communications, Inc. (potentially a lingering or re-recorded release).

  6. 2016-07-29 · reel 037672/0661 · Security Interest

    CHELSIO COMMUNICATIONS, INC.NOVIRIAN CAPITAL

    Correspondent: Joel L. Weiss

    Grant of security interest by Chelsio Communications to Novirian Capital.

  7. 2017-04-25 · reel 039433/0880 · Release By Secured Party

    NOVIRIAN CAPITALCHELSIO COMMUNICATIONS, INC.

    Correspondent: Joel L. Weiss

    Release of security interest by Novirian Capital to Chelsio Communications, Inc.

  8. 2019-08-14 · reel 045330/0034 · Security Interest

    CHELSIO COMMUNICATIONS, INC.WESTERN ALLIANCE BANK, AN ARIZONA CORPORATION

    Correspondent: Matthew M. Sarver · Buchalter

    Grant of security interest by Chelsio Communications to Western Alliance Bank.

  9. 2019-08-15 · reel 045336/0383 · Correction

    CHELSIO COMMUNICATIONS, INC.WESTERN ALLIANCE BANK, AN ARIZONA CORPORATION

    Correspondent: Matthew M. Sarver · Buchalter

    Corrective assignment related to a security interest.

  10. 2025-12-18 · reel 063515/0644 · Release of Security Interest

    WESTERN ALLIANCE BANK, AN ARIZONA CORPORATIONCHELSIO COMMUNICATIONS, INC.

    Correspondent: Matthew M. Sarver · Buchalter

    Release of security interest by Western Alliance Bank to Chelsio Communications, Inc.

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

  • Dimitrios Michailidis (Chelsio Communications Inc.)
  • Wael Noureddine (Chelsio Communications Inc.)
  • Felix A. Marti (Chelsio Communications Inc.)
  • Asgeir Thor Eiriksson (Chelsio Communications Inc.)

All inventors appear to have been employed by the original assignee, Chelsio Communications Inc., at the time of filing.

Original assignee

Chelsio Communications Inc. is the original assignee named on the issued patent. Chelsio Communications is known for developing and shipping products related to high-performance networking, particularly network adapters and controllers that incorporate TCP Offload Engine (TOE) technology, which embodies the claims of this patent. Their primary line of business is focused on cloud, data center, and enterprise networking solutions. As of today's date, Chelsio Communications Inc. is an operating company.

Assignment timeline

A search of the USPTO Assignment Center for patent number 8,589,587 reveals the following assignments:

  • 2007-05-11 (executed) / recorded 2007-05-11 — Reel 019484/0488

    • Conveyance: Assignment of Assignors Interest (See Document for Details)
    • Assignor: Marti, Felix A., Eiriksson, Asgeir Thor, Michailidis, Dimitrios, Noureddine, Wael
    • Assignee: Chelsio Communications, Inc.
    • Correspondent: Jeffrey A. Bergman, Bergman & Song LLP, PO Box 3186, Saratoga, CA 95070-1186
    • Context: Original assignment from inventors to Chelsio Communications, Inc.

  • 2014-03-19 (executed) / recorded 2014-03-19 — Reel 032227/0268

    • Conveyance: Security Interest (See Document for Details)
    • Assignor: Chelsio Communications, Inc.
    • Assignee: East West Bank
    • Correspondent: Scott W. Johnson, Law Offices of Scott W. Johnson, 21250 Stevens Creek Blvd., Suite 200, Cupertino, CA 95014
    • Context: Grant of security interest by Chelsio Communications to East West Bank.

  • 2014-10-21 (executed) / recorded 2014-10-21 — Reel 032890/0734

    • Conveyance: Release By Secured Party (See Document for Details)
    • Assignor: East West Bank
    • Assignee: Chelsio Communications, Inc.
    • Correspondent: Scott W. Johnson, Law Offices of Scott W. Johnson, 21250 Stevens Creek Blvd., Suite 200, Cupertino, CA 95014. This correspondent also appears on reel 032227/0268 for this patent.
    • Context: Release of security interest by East West Bank to Chelsio Communications, Inc.

  • 2014-10-21 (executed) / recorded 2014-10-21 — Reel 032890/0736

    • Conveyance: Security Interest (See Document for Details)
    • Assignor: Chelsio Communications, Inc.
    • Assignee: Silicon Valley Bank
    • Correspondent: Scott W. Johnson, Law Offices of Scott W. Johnson, 21250 Stevens Creek Blvd., Suite 200, Cupertino, CA 95014. This correspondent also appears on reel 032227/0268 and 032890/0734 for this patent.
    • Context: Grant of new security interest by Chelsio Communications to Silicon Valley Bank.

  • 2016-07-15 (executed) / recorded 2016-07-15 — Reel 037568/0871

    • Conveyance: Release By Secured Party (See Document for Details)
    • Assignor: East West Bank
    • Assignee: Chelsio Communications, Inc.
    • Correspondent: Christopher P. King, Jones Day, 201 South Tryon Street, Suite 2600, Charlotte, NC 28202
    • Context: Release of a security interest by East West Bank to Chelsio Communications, Inc. (potentially a lingering or re-recorded release).

  • 2016-07-29 (executed) / recorded 2016-07-29 — Reel 037672/0661

    • Conveyance: Security Interest (See Document for Details)
    • Assignor: Chelsio Communications, Inc.
    • Assignee: Novirian Capital
    • Correspondent: Joel L. Weiss, 2400 Geng Road, Suite 200, Palo Alto, CA 94303
    • Context: Grant of security interest by Chelsio Communications to Novirian Capital.

  • 2017-04-25 (executed) / recorded 2017-04-25 — Reel 039433/0880

    • Conveyance: Release By Secured Party (See Document for Details)
    • Assignor: Novirian Capital
    • Assignee: Chelsio Communications, Inc.
    • Correspondent: Joel L. Weiss, 2400 Geng Road, Suite 200, Palo Alto, CA 94303. This correspondent also appears on reel 037672/0661 for this patent.
    • Context: Release of security interest by Novirian Capital to Chelsio Communications, Inc.

  • 2019-08-14 (executed) / recorded 2019-08-14 — Reel 045330/0034

    • Conveyance: Security Interest (See Document for Details)
    • Assignor: Chelsio Communications, Inc.
    • Assignee: Western Alliance Bank, an Arizona Corporation
    • Correspondent: Matthew M. Sarver, Buchalter, 18201 Von Karman Avenue, Suite 800, Irvine, CA 92612
    • Context: Grant of security interest by Chelsio Communications to Western Alliance Bank.

  • 2019-08-15 (executed) / recorded 2019-08-15 — Reel 045336/0383

    • Conveyance: Corrective Assignment to Correct the the First Page of the Intellectual Property Security Agreement Has An Incorrect Date That Needs To Be Corrected Previously Recorded on Reel 050050 Frame 0396. Assignor(s) Hereby Confirms The Security Interest.
    • Assignor: Chelsio Communications, Inc.
    • Assignee: Western Alliance Bank, An Arizona Corporation
    • Correspondent: Matthew M. Sarver, Buchalter, 18201 Von Karman Avenue, Suite 800, Irvine, CA 92612. This correspondent also appears on reel 045330/0034 for this patent.
    • Context: Corrective assignment related to a security interest. Note: The reel/frame referenced in the description (050050/0396) does not exist for this patent.

  • 2025-12-18 (executed) / recorded 2025-12-18 — Reel 063515/0644

    • Conveyance: Release of Security Interest
    • Assignor: Western Alliance Bank, An Arizona Corporation
    • Assignee: Chelsio Communications, Inc.
    • Correspondent: Matthew M. Sarver, Buchalter, 18201 Von Karman Avenue, Suite 800, Irvine, CA 92612. This correspondent also appears on reel 045330/0034 and 045336/0383 for this patent.
    • Context: Release of security interest by Western Alliance Bank to Chelsio Communications, Inc.

Timeline diagram

timeline
    title Ownership of US 8589587
    2007 : Filed by Chelsio Communications
    2013 : Patent issued
    2014 : Security interest to East West Bank
         : Release by East West Bank
         : Security interest to Silicon Valley Bank
    2016 : Release by East West Bank
         : Security interest to Novirian Capital
    2017 : Release by Novirian Capital
    2019 : Security interest to Western Alliance
         : Corrective assignment to Western Alliance
    2025 : Release by Western Alliance

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. All recorded assignments involve Chelsio Communications, Inc. as either the assignor or assignee, or financial institutions for security interests. There are no indications of transfers to shell entities with "IP / Patents / Licensing / Holdings / Ventures" suffixes or addresses of registered-agent services.
  2. Known asserter in the chain — not present. None of the assignees (Chelsio Communications, Inc., East West Bank, Silicon Valley Bank, Novirian Capital, Western Alliance Bank) appear on common public NPE lists.
  3. Repeat correspondent across the chain — present. Scott W. Johnson of Law Offices of Scott W. Johnson appears as the correspondent for three consecutive assignments involving Chelsio Communications, Inc., East West Bank, and Silicon Valley Bank (Reel 032227/0268, 032890/0734, 032890/0736). Matthew M. Sarver of Buchalter appears as the correspondent for three consecutive assignments involving Chelsio Communications, Inc. and Western Alliance Bank (Reel 045330/0034, 045336/0383, 063515/0644).
  4. Cascading transfers — not present. The transfers primarily relate to security interests and releases, not consecutive assignments of ownership through chained LLCs.
  5. Pre-litigation transfer — not present. As of May 1, 2026, there is no known litigation for this patent, making it impossible to assess a pre-litigation transfer.
  6. Bankruptcy fire-sale — not present. The assignment records do not indicate any bankruptcy proceedings for Chelsio Communications, Inc.
  7. Privateering — not present. There is no evidence of a transfer to an NPE that asserts on Chelsio's behalf against competitors.
  8. Defensive aggregator (anti-NPE) — not present. The patent has not been assigned to any known defensive aggregators.

Verdict

Insufficient data. While there is a pattern of repeat correspondents for security interest recordings, which can sometimes be a weak indicator of centralized legal management for various entities, in this specific case, all transfers (excluding the initial inventor assignment) are security interests or their releases with established financial institutions. There are no transfers of patent ownership to shell entities or known NPEs. Therefore, there is insufficient evidence to confidently classify this patent as being involved in an NPE pattern.

The full assignment record can be verified at the USPTO Assignment Center by searching for patent number 8,589,587.

Generated 5/31/2026, 12:49:07 PM