% Expired Patents = 25.0

Forward Citations = 3

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4 inventors (with patents filed for the assignee):

Yuichiro Tsutsui (2 out of 14 patents)

Takeshi Natsuno (1 out of 19 patents)

Tomosaburo Kojima (1 out of 1 patent)

4. Kouji Koizumi (1 out of 1 patent)

4 patents: Sort by Forward Citations

1. 10460537 - Gate control method, authentication device, and gate control system (2019-10-29),

2. 7753282 - Mobile communication terminal and program therefor (2010-07-13),

3. 7660858 - Mail distributing apparatus, program and mail transmitting method capable of shortening average wait time for completing transmission of mails (2010-02-09),

4. 7513435 - Service providing system (2009-04-07),

Company Overview

Techfirm Inc. is a leading technology company specializing in providing innovative solutions in software development, cybersecurity, cloud computing, and IT consulting services. With a team of experienced professionals, we strive to deliver cutting-edge technology solutions to help businesses thrive in the digital age.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

4 Patents

#3,058 in Tokyo

#7,588 in Japan

Tokyo, Japan

Techfirm Inc.

Forward Citations = 3

4 inventors:

Yuichiro Tsutsui (2 out of 14 patents)

Takeshi Natsuno (1 out of 19 patents)

Tomosaburo Kojima (1 out of 1 patent)

4. Kouji Koizumi (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Techfirm Inc.. Retrieved from https://idiyas.com/company/techfirm

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]