Forward Citations = 5

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2 inventors (with patents filed for the assignee):

Satoshi Narumi (2 out of 34 patents)

Kimio Yoshimura (2 out of 3 patents)

2 patents: Sort by Forward Citations

1. 5141684 - Method of preparing urethane foam articles (1992-08-25),

2. 5139713 - Method of preparing urethane foam articles (1992-08-18),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#4,372 in Tokyo

#11,139 in Japan

Tokyo, Japan

Tokyo Sheet Co., Ltd.

Forward Citations = 5

2 inventors:

Satoshi Narumi (2 out of 34 patents)

Kimio Yoshimura (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tokyo Sheet Co., Ltd.. Retrieved from https://idiyas.com/company/tokyo-sheet-company

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]