Pentax Industrial Instruments Co., Ltd.

Calculating rank

USPTO Granted Patents = 3

% Expired Patents = 33.3

Forward Citations = 69

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6 inventors (with patents filed for the assignee):

Homu Takayama (2 out of 18 patents)

Takanori Yachi (2 out of 5 patents)

Masatoshi Sakurai (2 out of 2 patents)

4. Shunji Matsuo (2 out of 34 patents)

5. Eiji Hayamizu (1 out of 78 patents)

6. Masayoshi Ootsuki (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 7669340 - Surveying apparatus (2010-03-02),

2. 7503123 - Surveying apparatus (2009-03-17),

3. D576062 - Total station (2008-09-02),

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USPTO Data Jan 1 1976 - Nov 3 2026

3 Patents

#3,551 in Tokyo

#8,934 in Japan

Tokyo, Japan

Pentax Industrial Instruments Co., Ltd.

Forward Citations = 69

6 inventors:

Homu Takayama (2 out of 18 patents)

Takanori Yachi (2 out of 5 patents)

Masatoshi Sakurai (2 out of 2 patents)

4. Shunji Matsuo (2 out of 34 patents)

5. Eiji Hayamizu (1 out of 78 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Pentax Industrial Instruments Co., Ltd.. Retrieved from https://idiyas.com/company/pentax-industrial-instruments-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]