% Expired Patents = 33.3

Trademarks = 3

Forward Citations = 21

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10 inventors (with patents filed for the assignee):

Hiroshi Sugawara (3 out of 53 patents)

Seiichiro Ishijima (3 out of 3 patents)

Tadashi Oshimi (3 out of 5 patents)

4. Kazutaka Yamamoto (3 out of 3 patents)

5. Noboru Yazaki (3 out of 4 patents)

6. Tomoji Utsugi (2 out of 2 patents)

7. Koji Takahashi (2 out of 37 patents)

8. Nobuhiko Suzuki (1 out of 6 patents)

9. Kazuo Furukawa (1 out of 1 patent)

10. Akira Unosawa (1 out of 2 patents)

6 patents: Sort by Forward Citations

1. 10126752 - Work machine, system, method, program, and recording medium recording program for generating travel route of work machine, for determining availability of entry to travel route, and for automatically selecting travel route, and travel control system of work machine (2018-11-13),

2. 10120382 - Work machine, system, method, and recording medium recording computer program for determining availability of entry to travel route, and travel control system of work machine (2018-11-06),

3. 10114377 - Work machine, system, method, and recording medium recording computer program for generating travel route of work machine, and travel control system of work machine (2018-10-30),

4. 8720634 - Working vehicle (2014-05-13),

5. 8627642 - Clippings collecting-discharging device (2014-01-14),

6. 6679787 - Golf shaft and golf club having the same (2004-01-20),

Company Overview

Mamiya-op Co., Ltd. is a Japanese company specializing in the development and manufacturing of precision industrial machinery. With over 50 years of experience, the company has become a trusted name in the industry for its high-quality products and technological innovation. Mamiya-op is committed to providing innovative solutions to meet the evolving needs of its customers worldwide.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

6 Patents

#2,469 in Tokyo

#5,990 in Japan

Tokyo, Japan

Mamiya-Op Co., Ltd.

Forward Citations = 21

10 inventors:

Hiroshi Sugawara (3 out of 53 patents)

Seiichiro Ishijima (3 out of 3 patents)

Tadashi Oshimi (3 out of 5 patents)

4. Kazutaka Yamamoto (3 out of 3 patents)

5. Noboru Yazaki (3 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Mamiya-Op Co., Ltd.. Retrieved from https://idiyas.com/company/mamiya-op-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]