Shigematsu Co.

Calculating rank

USPTO Granted Patents = 5

% Expired Patents = 40.0

EPO Patents = 1

Forward Citations = 8

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4 inventors (with patents filed for the assignee):

Takeshi Shigematsu (2 out of 2 patents)

Ayami Tamai (1 out of 1 patent)

Kazuhiro Mori (1 out of 37 patents)

4. Yoshikatsu Shigematsu (1 out of 1 patent)

5. Yoshikatsu Shigematsu (0 patent)

5 patents: Sort by Forward Citations

1. 11758961 - Headwear (2023-09-19),

2. 7516825 - Clutch mechanism (2009-04-14),

3. 7448541 - Product information acquisition apparatus (2008-11-11),

4. 7428955 - Clutch mechanism (2008-09-30),

5. 6952624 - Production system and production method (2005-10-04),

Company Overview

Shigematsu Co. is a leading manufacturer of high-quality safety equipment and protective gear. With decades of experience, Shigematsu is committed to providing innovative solutions to protect workers in various industries. The company offers a wide range of respiratory protection products, including respirators, filters, and accessories. Shigematsu's products are designed to meet the highest safety standards and ensure the well-being of workers in hazardous environments. Visit their website to learn more about their products and services.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

5 Patents

#1 in Iyo

#6,656 in Japan

Iyo, Japan

Shigematsu Co.

Forward Citations = 8

4 inventors:

Takeshi Shigematsu (2 out of 2 patents)

Ayami Tamai (1 out of 1 patent)

Kazuhiro Mori (1 out of 37 patents)

4. Yoshikatsu Shigematsu (1 out of 1 patent)

5. Yoshikatsu Shigematsu (0 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Shigematsu Co.. Retrieved from https://idiyas.com/company/shigematsu-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]

1 patent (EPO):

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]