Kyokuto Boeki Kaisha, Ltd.

Calculating rank

USPTO Granted Patents = 3

Forward Citations = 42

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7 inventors (with patents filed for the assignee):

Sakari Ohira (2 out of 12 patents)

Masaaki Ozawa (2 out of 3 patents)

Isamu Itoh (1 out of 4 patents)

4. Masatoshi Yamaki (1 out of 1 patent)

5. Akira Terashima (1 out of 1 patent)

6. Toshiyuki Ueno (1 out of 2 patents)

7. Yasuyuki Morita (1 out of 2 patents)

3 patents: Sort by Forward Citations

1. 5508619 - System for discriminating kinds of surges on power transmission lines (1996-04-16),

2. 5070537 - System for detecting defective point on power transmission line by (1991-12-03),

3. 4139320 - Process for excavating and constructing tunnel and excavating device (1979-02-13),

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USPTO Data Jan 1 1976 - Nov 3 2026

3 Patents

#3,555 in Tokyo

#8,945 in Japan

Tokyo, Japan

Kyokuto Boeki Kaisha, Ltd.

Forward Citations = 42

7 inventors:

Sakari Ohira (2 out of 12 patents)

Masaaki Ozawa (2 out of 3 patents)

Isamu Itoh (1 out of 4 patents)

4. Masatoshi Yamaki (1 out of 1 patent)

5. Akira Terashima (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kyokuto Boeki Kaisha, Ltd.. Retrieved from https://idiyas.com/company/kyokuto-boeki-kaisha

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]