Tokina Optical Co., Ltd.

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USPTO Granted Patents = 3

Forward Citations = 42

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6 inventors (with patents filed for the assignee):

Isao Kawaguchi (1 out of 3 patents)

Banri Ozeki (1 out of 1 patent)

Yoshimi Yamashita (1 out of 1 patent)

4. Tatsuyo Takanashi (1 out of 1 patent)

5. Shin Ikeda (1 out of 1 patent)

6. Masakuni Tai (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 4729643 - Telephoto zoom lens system for camera (1988-03-08),

2. 4306762 - Reflecting apparatus in an optical system (1981-12-22),

3. 4072405 - Prism system for use in tricolor separation (1978-02-07),

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USPTO Data Jan 1 1976 - Nov 10 2026

3 Patents

#3,559 in Tokyo

#8,951 in Japan

Tokyo, Japan

Tokina Optical Co., Ltd.

Forward Citations = 42

6 inventors:

Isao Kawaguchi (1 out of 3 patents)

Banri Ozeki (1 out of 1 patent)

Yoshimi Yamashita (1 out of 1 patent)

4. Tatsuyo Takanashi (1 out of 1 patent)

5. Shin Ikeda (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tokina Optical Co., Ltd.. Retrieved from https://idiyas.com/company/tokina-optical-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]