Assignment history

Inventors

Based on the patent document, there is a single inventor listed:

• Yoshirou Satou: The patent does not specify the inventor's employer at the time of filing. However, given that NEC Corporation was the original assignee, it is standard practice that Mr. Satou was an employee of NEC Corporation at the time the invention was made and the application was filed. There are no unusual patterns, such as a mass departure of inventors, evident from the public record.

Original assignee

The original assignee of US patent 10,623,095 was NEC Corporation, a major Japanese multinational information technology and electronics corporation headquartered in Tokyo, Japan.

NEC is a large, diversified operating company that has historically developed and sold a wide range of products, including telecommunications equipment, network solutions, and IT services. It is highly probable that NEC developed or sold products, such as optical transport network equipment, that could embody the claims of the patent. The company remains a major operating entity today.

Assignment timeline

The following is the complete, chronologically ordered assignment history for US patent 10,623,095 as recorded with the USPTO.

• 2024-03-21 (executed) / recorded 2024-03-21 — Reel 070575/0077

  • Conveyance: Assignment of Assignor's Interest
  • Assignor: NEC CORPORATION
  • Assignee: NEC ASIA PACIFIC PTE. LTD.
  • Correspondent: MASAO YAMAZAKI, 1-24-1, MATSUYAMACHO, KITA-KU, NIIGATA, 950-3102, JAPAN
  • Context: This appears to be an internal reorganization, transferring the patent from the Japanese parent company to a Singapore-based subsidiary.

• 2024-05-15 (executed) / recorded 2024-10-03 — Reel 072481/0695

  • Conveyance: Assignment of Assignor's Interest
  • Assignor: NEC ASIA PACIFIC PTE. LTD.
  • Assignee: IP WAVE PTE. LTD.
  • Correspondent: KENTA SATO, SATO & ASSOCIATES, 1-11-24, Nishikanda, Chiyoda-ku, Tokyo, 101-0065, Japan
  • Context: Transfer from an NEC entity to IP WAVE PTE. LTD., which is described by industry sources as an entity that acquires and monetizes patent assets, indicating a divestment or fire-sale of the patent from its original owner.

• 2025-02-14 (executed) / recorded 2025-03-20 — Reel 074215/0438

  • Conveyance: Assignment of Assignor's Interest
  • Assignor: IP WAVE PTE. LTD.
  • Assignee: PLS XLIV LLC
  • Correspondent: Ramy Emam, Emam & Associates, P.A., 15000 SW 79th CT, Miami, FL 33158. This correspondent is a recurring pattern.
  • Context: Transfer to a US-based LLC, PLS XLIV LLC, suggesting a move to prepare the asset for monetization or assertion in the United States.

• 2025-09-22 (executed) / recorded 2025-10-01 — Reel 075932/0812

  • Conveyance: Change of Name
  • Assignor: PLS XLIV LLC
  • Assignee: RADIANT PATENTS LLC
  • Correspondent: Ramy Emam, Emam & Associates, P.A., 15000 SW 79th CT, Miami, FL 33158. This is the same correspondent as the previous transfer.
  • Context: This is a simple change of name, not a transfer of ownership, from PLS XLIV LLC to Radiant Patents LLC. Both entities are controlled by the same ultimate parent.

• 2025-02-14 (executed) / recorded 2025-11-13 — Reel 076299/0210

  • Conveyance: Corrective Assignment
  • Assignor: IP WAVE PTE. LTD.
  • Assignee: PLS XLIV LLC
  • Correspondent: Ramy Emam, Emam & Associates, P.A., 15000 SW 79th CT, Miami, FL 33158. This is the same correspondent as the previous two transfers.
  • Context: A corrective assignment to fix errors in the patent numbers listed in the prior assignment recorded at Reel 074215/0438, confirming the transfer from IP WAVE to PLS XLIV LLC.

Timeline diagram

timeline
    title Ownership of US 10623095
    2014 : Priority date
    2018 : Application filed by NEC Corp
    2020 : Patent issued to NEC Corp
    2024 : Assigned to NEC Asia Pacific
         : Assigned to IP WAVE PTE LTD
    2025 : Assigned to PLS XLIV LLC
         : Name changed to Radiant Patents LLC
         : Corrective assignment filed
    2026 : First infringement suit filed

NPE / troll-pattern signals

1. Shell-entity transfer — Present.
   The patent was transferred from an operating company (NEC Corporation) to a series of entities culminating in Radiant Patents LLC (Reels 072481/0695, 074215/0438). Radiant Patents LLC is a Texas LLC with no known products, fitting the description of a licensing or assertion-only entity.

2. Known asserter in the chain — Present.
   The current assignee, Radiant Patents LLC, is identified by Unified Patents as a Non-Practicing Entity (NPE) and has filed litigation asserting this patent (Radiant Patents LLC v. Nokia, 2:26-cv-00074, E.D. Tex.).

3. Repeat correspondent across the chain — Present.
   The correspondent Ramy Emam of Emam & Associates, P.A. handled the recording for the transfer to PLS XLIV LLC (Reel 074215/0438), the subsequent change of name to Radiant Patents LLC (Reel 075932/0812), and the corrective assignment (Reel 076299/0210). This recurrence across multiple transactions involving related shell entities is a strong signal of a coordinated assertion campaign.

4. Cascading transfers — Present.
   The patent was transferred three times in less than 24 months: from NEC to NEC Asia Pacific (Mar 2024), then to IP WAVE (May 2024), then to PLS XLIV LLC (Feb 2025). This rapid chain of transfers from the original creator to a series of monetization-focused entities is a classic NPE pattern.

5. Pre-litigation transfer — Present.
   The final effective ownership change to the asserting entity structure (PLS XLIV LLC / Radiant Patents LLC) was recorded in March 2025. The first infringement suit was filed in January 2026. This transfer occurred well within a year of the litigation, indicating the patent was acquired for the purpose of assertion.

6. Bankruptcy fire-sale — Not present.
   NEC Corporation is a solvent, operating company. The transfer was a business decision, not part of a bankruptcy proceeding.

7. Privateering — Unclear.
   There is no public evidence to suggest that NEC Corporation is directing or benefiting from Radiant Patents LLC's assertion activities against Nokia. This appears to be a standard divestment to a third-party NPE.

8. Defensive aggregator (anti-NPE) — Not present.
   The chain does not end at a known defensive aggregator. On the contrary, it ends with a known plaintiff NPE.

Verdict

NPE — high confidence

The verdict is based on multiple strong and unambiguous signals. The patent was transferred from its original creator, an operating company (NEC), through a cascade of entities to a known NPE, Radiant Patents LLC, which has no products and exists to license and litigate patents (Signal 1, 2). The same correspondent, Ramy Emam, managed the series of transactions that moved the patent into the asserting entity's hands, a hallmark of professional NPE operations (Signal 3). Finally, these transfers occurred in a rapid sequence shortly before litigation was initiated (Signals 4, 5).

Verification of the assignment history can be performed at the USPTO Patent Assignment Search page by searching for patent number 10623095.