Patent 11456365

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.

Active provider: Google · gemini-2.5-flash

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

  • Igor Polishchuk: Not explicitly stated, but likely employed by Longitude Flash Memory Solutions Ltd. at the time of filing, as they are the original assignee.
  • Sagy Charel Levy: Not explicitly stated, but likely employed by Longitude Flash Memory Solutions Ltd. at the time of filing.
  • Krishnaswamy Ramkumar: Not explicitly stated, but likely employed by Longitude Flash Memory Solutions Ltd. at the time of filing.

No unusual patterns (e.g., all inventors departing the original assignee within 12 months of filing) are determinable from the provided information.

Original assignee

The original assignee is Longitude Flash Memory Solutions Ltd.

It is unclear from the provided patent text whether Longitude Flash Memory Solutions Ltd. shipped a product embodying the claims. The patent generally describes semiconductor devices, specifically non-volatile memory transistors, which are components within electronic products rather than end-user products themselves.

Their primary line of business, based on the patent's technical field, is semiconductor devices and integrated circuits, particularly non-volatile semiconductor memories.

Their current status (operating, acquired, dissolved, in bankruptcy) is not determinable from the provided patent information.

Assignment timeline

The USPTO Assignment Center search for patent US11456365 shows no recorded assignments for this specific patent. This indicates that the original assignee, Longitude Flash Memory Solutions Ltd., still holds the direct assignment record for this patent, as far as the USPTO's public assignment database reflects.

However, further investigation into Longitude Flash Memory Solutions Ltd. and its affiliates provides important context regarding the ownership and licensing of this patent. Longitude Flash Memory Solutions, Ltd. (LFMS) is an affiliate of IPValue Management, Inc. (IPValue) and Longitude Licensing Ltd. (LLL). IPValue is a company that specializes in monetizing intellectual property portfolios. LFMS acquired its patent portfolio, including patents related to memory technology, from Cypress Semiconductor, which was acquired by Infineon Technologies in 2020. Longitude Licensing Ltd., as an exclusive licensee or in conjunction with IPValue Management, Inc., conducts the licensing of the LFMS portfolio.

Therefore, while the direct assignment record for US11456365 isn't publicly recorded as transferred from Longitude Flash Memory Solutions Ltd. to another entity in the USPTO Assignment Center, the patent is part of a portfolio managed and licensed by Longitude Licensing Ltd. and IPValue Management, Inc.

Timeline diagram

timeline
    title Ownership of US 11456365
    2007 : Priority date May 25
    2008 : Filed by Longitude Flash Memory Solutions Ltd
    2022 : Issued to Longitude Flash Memory Solutions Ltd

NPE / troll-pattern signals

  1. Shell-entity transfer — Present. Although there is no direct assignment recorded in the USPTO Assignment Center for US11456365, Longitude Flash Memory Solutions Ltd. (LFMS) is an affiliate of IPValue Management, Inc. (IPValue) and Longitude Licensing Ltd. (LLL). IPValue's mission is to unlock value from IP portfolios and has generated billions from patent licenses, indicating a focus on patent monetization rather than product manufacturing. Longitude Licensing Ltd. is explicitly described as a "patent licensing entity." Longitude Licensing is based in Dublin, Ireland, and privately owned by Vector Capital. These characteristics strongly suggest that LFMS and LLL operate as licensing-only entities.

  2. Known asserter in the chain — Present. Longitude Licensing Ltd. and its affiliates, including Longitude Flash Memory Solutions Ltd., are explicitly associated with IPValue Management, Inc. IPValue Management is a known entity in the patent monetization space, often referred to in the context of patent assertion. IPValue Management's affiliates have been involved in various patent litigation, including against companies like SK Hynix, Samsung, Micron, and Sandisk.

  3. Repeat correspondent across the chain — Unclear. Without specific reel/frame entries for assignments of US11456365 from the USPTO Assignment Center, it is not possible to determine if the same correspondent attorney has appeared multiple times in the chain for this specific patent.

  4. Cascading transfers — Unclear. No recorded assignments for US11456365 are present in the USPTO Assignment Center, so cascading transfers cannot be identified for this specific patent.

  5. Pre-litigation transfer — Unclear. As there are no recorded assignments for this patent in the USPTO Assignment Center, it is not possible to determine if a transfer occurred within 6 months of litigation. However, the current litigation involving Longitude Flash Memory Solutions Ltd. (e.g., IPR2025-01281 filed by Sandisk Technologies, Inc. against LFMS) suggests that the patent is part of an asserted portfolio.

  6. Bankruptcy fire-sale — Not Present. There is no information in the provided patent text or search results to suggest that Longitude Flash Memory Solutions Ltd. or any prior owner underwent a bankruptcy fire-sale.

  7. Privateering — Unclear. While Longitude Flash Memory Solutions Ltd. acquired its patent portfolio from Cypress Semiconductor, which was later acquired by Infineon Technologies, there's no direct evidence in the provided text to confirm that Longitude is asserting these patents on behalf of Cypress/Infineon against their competitors.

  8. Defensive aggregator (anti-NPE) — Not Present. The information indicates that Longitude Flash Memory Solutions Ltd. and its affiliates are involved in licensing and assertion, which is contrary to the role of a defensive aggregator.

Verdict

NPE — high confidence

Longitude Flash Memory Solutions Ltd. (LFMS) is an affiliate of IPValue Management, Inc. (IPValue) and Longitude Licensing Ltd. (LLL), both of which are known patent monetization entities. IPValue's stated mission to "unlock value from their IP portfolios" through licensing, and LLL being a "patent licensing entity," strongly indicates an NPE model. Furthermore, LFMS has been actively involved in licensing agreements and litigation with major semiconductor companies like SK Hynix, Samsung, Micron, and Sandisk. The IPR case IPR2025-01281 filed by Sandisk Technologies, Inc. against Longitude Flash Memory Solutions Ltd. also confirms assertion activity.

(Verification: Search US11456365 at https://assignmentcenter.uspto.gov/)

Generated 5/23/2026, 12:47:47 PM