Heisei Polymer Co., Ltd.

Calculating rank

USPTO Granted Patents = 3

Forward Citations = 59

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4 inventors (with patents filed for the assignee):

Kiyoshi Murata (3 out of 19 patents)

Yoshihiko Watanabe (3 out of 10 patents)

Masamitsu Tsukada (3 out of 3 patents)

4. Yasushi Ota (3 out of 4 patents)

3 patents: Sort by Forward Citations

1. 5419933 - Annular article-wrapping member and method of making same (1995-05-30),

2. 5203137 - Annular article-wrapping member and method of making same (1993-04-20),

3. 5186989 - Annular article-wrapping member and method of making same (1993-02-16),

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USPTO Data Jan 1 1976 - Oct 27 2026

3 Patents

#3,551 in Tokyo

#8,934 in Japan

Tokyo, Japan

Heisei Polymer Co., Ltd.

Forward Citations = 59

4 inventors:

Kiyoshi Murata (3 out of 19 patents)

Yoshihiko Watanabe (3 out of 10 patents)

Masamitsu Tsukada (3 out of 3 patents)

4. Yasushi Ota (3 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Heisei Polymer Co., Ltd.. Retrieved from https://idiyas.com/company/heisei-polymer-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]