Forward Citations = 33

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2 inventors (with patents filed for the assignee):

Seiji Kagawa (5 out of 46 patents)

Yoichiro Kagawa (3 out of 14 patents)

5 patents: Sort by Forward Citations

1. 9616640 - Composite film of linearly-scratched, thin metal film and plastic film, and its production apparatus (2017-04-11),

2. 9096013 - Apparatus for forming slant, linear easy-to-tear portions on long plastic film (2015-08-04),

3. 5648107 - Porous film manufacturing apparatus (1997-07-15),

4. 5458951 - Porous film, method for manufacturing the same, gas permeability control (1995-10-17),

5. 5415538 - Porous film manufacturing apparatus (1995-05-16),

Company Overview

Seiji Kagawa is a renowned designer and craftsman specializing in handcrafted furniture and home decor. With a focus on traditional Japanese aesthetics and modern design principles, Seiji Kagawa creates unique pieces that blend functionality and artistry. Each item is meticulously crafted using high-quality materials and techniques passed down through generations. Explore Seiji Kagawa's collection to discover timeless pieces that elevate any living space.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

5 Patents

#1 in Koshigaya

#6,652 in Japan

Koshigaya, Japan

Seiji Kagawa

Forward Citations = 33

2 inventors:

Seiji Kagawa (5 out of 46 patents)

Yoichiro Kagawa (3 out of 14 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Seiji Kagawa. Retrieved from https://idiyas.com/company/seiji-kagawa

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]