% Expired Patents = 57.1

Forward Citations = 99

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1 inventor (with patents filed for the assignee):

Hiroshi Ichigaya (7 out of 30 patents)

7 patents: Sort by Forward Citations

1. 8129013 - Human-body aimed spacer, human-body aimed airflow passage, and general-purpose spacer (2012-03-06),

2. 7272946 - Cooling clothes (2007-09-25),

3. 7120938 - Cooling cloths (2006-10-17),

4. 6779592 - Cooling futon (2004-08-24),

5. 6619382 - Spacer for cooling devices (2003-09-16),

6. 6516624 - Cooling pillow (2003-02-11),

7. 6222181 - Position measuring instrument measuring relative turning angle of light sources for receiving devices (2001-04-24),

Company Overview

Seft Development Laboratory Co., Ltd. is a leading provider of software development and IT consulting services. With a team of experienced professionals, we specialize in custom software solutions, mobile app development, web design, and digital marketing. Our goal is to help businesses achieve their full potential through innovative technology solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

7 Patents

#94 in Saitama 343-0827

#5,456 in Japan

Saitama, Japan

Seft Development Laboratory Co., Ltd.

Forward Citations = 99

1 inventor:

Hiroshi Ichigaya (7 out of 30 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Seft Development Laboratory Co., Ltd.. Retrieved from https://idiyas.com/company/seft-development-laboratory-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]