Patent 9525084

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 (2)

Asserters network →

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

  1. 2016-09-19 · reel 038676/0122 · Assignment of Assignors Interest

    WANG, SHI-PING, WANG, SHI-YUANW&WSENS DEVICES, INC.

    Correspondent: · BLAKELY, SOKOLOFF, TAYLOR & ZAFMAN

    internal reorg

  2. 2024-10-23 · reel 066708/0748 · Security Agreement

    W&WSENS DEVICES, INC.IP LITFIN US 2024 LLC

    Correspondent: Andrew D. Skale · Mintz, Levin, Cohn, Ferris, Glovsky and Popeo

    securitization

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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Inventors

Original assignee

The original assignee, W&wsens Devices Inc., is listed as "Current Assignee" and "Original Assignee" on Google Patents. There is no information provided within the patent text to determine if W&wsens Devices Inc. shipped a product embodying the claims. The patent does not explicitly state their primary line of business, though the nature of the patent (photosensitive devices) suggests it is in the field of semiconductor devices or optoelectronics. As of the latest information, W&wsens Devices Inc. appears to be an active entity as it was involved in a patent security agreement in 2024.

Assignment timeline

  • 2016-09-19 (executed) / recorded 2016-09-19 — Reel 038676/0122
    • Conveyance: Assignment of Assignors Interest
    • Assignor: WANG, SHI-PING, WANG, SHI-YUAN
    • Assignee: W&WSENS DEVICES, INC.
    • Correspondent: BLAKELY, SOKOLOFF, TAYLOR & ZAFMAN LLP, 1279 OAKMEAD PARKWAY, SUNNYVALE, CALIFORNIA, 94085
    • Context: Transfer from individual inventors to their company.
  • 2024-10-23 (executed) / recorded 2024-10-23 — Reel 066708/0748
    • Conveyance: Patent Security Agreement
    • Assignor: W&WSENS DEVICES, INC.
    • Assignee: IP LITFIN US 2024 LLC
    • Correspondent: Andrew D. Skale, Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C., 3580 Carmel Mountain Road, Suite 300, San Diego, CA 92130.
    • Context: Securitization of the patent.

Timeline diagram

timeline
    title Ownership of US 9525084
    2015 : Filed by W&wsens Devices Inc
    2016 : Inventors assign to W&wsens Devices Inc
         : Issued
    2024 : Security agreement to IP LITFIN US 2024 LLC

NPE / troll-pattern signals

  1. Shell-entity transfer — present. The assignment from W&wsens Devices Inc. to IP LITFIN US 2024 LLC via a "Patent Security Agreement" on 2024-10-23 (Reel 066708/0748) is a strong indicator. "IP LITFIN" suggests a focus on intellectual property monetization rather than product development. Without further information on IP LITFIN US 2024 LLC, its name and the nature of the transaction (security agreement) align with characteristics of a shell entity likely involved in patent licensing or assertion.
  2. Known asserter in the chain — unclear. IP LITFIN US 2024 LLC is not immediately recognizable from the provided list of common NPEs. However, the litigation status showing an IPR proceeding initiated by "Unified Patents PTAB Data" and a district court case in the Eastern District of Texas (a venue frequently used by NPEs) suggests the patent is currently being asserted or is subject to assertion.
  3. Repeat correspondent across the chain — not present. The correspondent for the 2016 assignment was BLAKELY, SOKOLOFF, TAYLOR & ZAFMAN LLP, while for the 2024 security agreement it was Andrew D. Skale of Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C. These are different firms and individuals.
  4. Cascading transfers — not present. There are only two recorded assignments, separated by eight years.
  5. Pre-litigation transfer — unclear. A US case was filed in the Texas Eastern District Court (case 2:24-cv-00854), and the security agreement was recorded on 2024-10-23. The filing date of the Texas case is not precisely stated but its numbering "2:24-cv-00854" implies it was filed in 2024. If the case was filed within 6 months after October 23, 2024, it would indicate a pre-litigation transfer. More precise filing date for the litigation would be needed.
  6. Bankruptcy fire-sale — not present. There is no indication in the patent record or Google Patents legal events that W&wsens Devices Inc. has filed for bankruptcy.
  7. Privateering — unclear. There's no information available from SEC filings or other sources to suggest an operating company transferred the patent to an NPE for assertion against competitors.
  8. Defensive aggregator (anti-NPE) — not present. The chain does not terminate at a known defensive aggregator.

Verdict

NPE — moderate confidence. The primary signal is the transfer to "IP LITFIN US 2024 LLC" via a patent security agreement on 2024-10-23 (Reel 066708/0748), which strongly suggests a shell entity focused on intellectual property monetization. This is further supported by the existence of a lawsuit in the Eastern District of Texas (case 2:24-cv-00854), a common venue for patent assertion entities. [cite: "US case filed in Texas Eastern District Court", "https://assignmentcenter.uspto.gov/"]

Generated 5/20/2026, 12:47:45 AM