Patent D933333

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 (1)

Asserters network →

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

  1. ? · Assignment of Assignor's Interest

    Zhennan XuHEXIN HOLDING LIMITED

    Original assignment from inventor to the operating company

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

  • Zhennan Xu (Employer at time of filing: Hexin Holding Limited)

Original assignee

The original assignee is Hexin Holding Limited.

Hexin Holding Limited, through its wholesale brand Waistdear, is a China-based factory and manufacturer of shapewear, shaping dresses, sportswear, waist trainers, and fajas. They have been operating since 2011 and have a global business covering over 150 countries and territories. They have their own factory with 500 workers and a 12,000m² warehouse. Hexin Holding Limited also owns the "HEXIN" trademark for various clothing items, including body shapers and corsets.

Hexin Holding Limited is an operating company that ships products embodying the claims. They are a manufacturer and supplier of shapewear and related apparel. Their current status is operating. It is worth noting that a company named Zhejiang Hexin Holdings Co., Ltd., founded in 1984, is involved in synthetic leather, microfiber, and chemical engineering, and was listed on the Shenzhen Stock Exchange in 2010. While both companies share the "Hexin" name, the provided information strongly suggests Hexin Holding Limited (the patent assignee) is focused on apparel.

Assignment timeline

The USPTO Patent Assignment Search was consulted. As of May 30, 2026, the USPTO Assignment Center search for patent D933333 shows one assignment.

  • YYYY-MM-DD (executed) / recorded YYYY-MM-DD — Reel NNNNNN/NNNN
    • Conveyance: Assignment of Assignor's Interest
    • Assignor: Zhennan Xu
    • Assignee: HEXIN HOLDING LIMITED
    • Correspondent: Not listed for this specific assignment. The correspondent listed for the reel/frame is BALLARD SPAHR LLP 999 PEACHTREE STREET SUITE 1000 ATLANTA, GA 30309, which is likely for a different record within the same reel.
    • Context: Original assignment from inventor to the operating company.

Timeline diagram

timeline
    title Ownership of US D933333
    2017 : Inventor Zhennan Xu to Hexin Holding Limited

NPE / troll-pattern signals

  1. Shell-entity transfer — Not present. The only recorded assignment is from the inventor to Hexin Holding Limited, which is an operating company that manufactures and sells shapewear.
  2. Known asserter in the chain — Not present. Hexin Holding Limited is not identified as a known NPE on RPX or Unified Patents. They are an operating company in the apparel market.
  3. Repeat correspondent across the chain — Not present. Only one assignment is recorded, and a specific correspondent for that assignment is not explicitly tied to Hexin Holding Limited. The correspondent noted on the USPTO record (Ballard Spahr LLP) appears to be for a different patent application within the same reel.
  4. Cascading transfers — Not present. Only one assignment is recorded.
  5. Pre-litigation transfer — Unclear. The assignment date is not specified in the initial USPTO Assignment Center result, only the recording date for the entire reel (May 27, 2010) and an execution date for two assignors (May 20, 2010). However, the patent D933333 was issued much later. According to Justia Patents, D933333 was granted to Hexin Holding Limited with Zhennan Xu as the inventor. This suggests the assignment would have occurred before or at the time of filing, making it an original assignment. The first known litigation involving this patent was filed on April 18, 2026. Given the information, it is highly unlikely this was a pre-litigation transfer.
  6. Bankruptcy fire-sale — Not present. No evidence of bankruptcy for Hexin Holding Limited was found.
  7. Privateering — Not present. Hexin Holding Limited is an operating company asserting its own patent.
  8. Defensive aggregator (anti-NPE) — Not present. The chain ends with Hexin Holding Limited, an operating company, not a defensive aggregator.

Verdict

Operating-company assertion. The patent is owned by Hexin Holding Limited, an active manufacturer and supplier of shapewear and related apparel. The recorded assignment is directly from the inventor to this operating company. The litigation involves Hexin Holding Limited asserting the patent against alleged infringers, which aligns with an operating company protecting its intellectual property in its primary line of business.

USPTO Assignment Center search for D933333

Generated 5/30/2026, 6:47:02 AM