Showa Tool Co., Ltd.

Calculating rank

USPTO Granted Patents = 5

Forward Citations = 78

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11 inventors (with patents filed for the assignee):

Kazuo Rokkaku (2 out of 8 patents)

Eiichi Katayama (2 out of 3 patents)

Kouichi Ueda (2 out of 8 patents)

4. Shinji Yasuhara (1 out of 17 patents)

5. Yoshihisa Hiroumi (1 out of 1 patent)

6. Shogo Kitamura (1 out of 1 patent)

7. Yoshiaki Kakino (1 out of 13 patents)

8. Hiroaki Takebayashi (1 out of 19 patents)

9. Yasushi Fukuta (1 out of 1 patent)

10. Takayasu Hiroumi (1 out of 1 patent)

11. Toshiaki Oku (1 out of 2 patents)

5 patents: Sort by Forward Citations

1. 9149874 - Tool holder (2015-10-06),

2. 6224306 - Tool Holder (2001-05-01),

3. 5033921 - Traction drive tool adapter (1991-07-23),

4. 4960405 - Traction drive spindle device (1990-10-02),

5. 4478538 - Device for detecting tool abnormality (1984-10-23),

Company Overview

Showa Tool Co., Ltd. is a leading manufacturer of cutting tools and precision machining solutions. With over 50 years of experience, the company offers a wide range of high-quality products for various industries including automotive, aerospace, and medical. Showa Tool is committed to innovation, quality, and customer satisfaction.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

5 Patents

#5 in Tottori

#6,656 in Japan

Tottori, Japan

Showa Tool Co., Ltd.

Forward Citations = 78

11 inventors:

Kazuo Rokkaku (2 out of 8 patents)

Eiichi Katayama (2 out of 3 patents)

Kouichi Ueda (2 out of 8 patents)

4. Shinji Yasuhara (1 out of 17 patents)

5. Yoshihisa Hiroumi (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Showa Tool Co., Ltd.. Retrieved from https://idiyas.com/company/showa-tool-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]