% Expired Patents = 28.6

Forward Citations = 32

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6 inventors (with patents filed for the assignee):

Masaki Usui (4 out of 5 patents)

Kazuhiro Watanabe (3 out of 135 patents)

Manabu Takahashi (3 out of 46 patents)

4. Yasuharu Hakamatsuka (3 out of 19 patents)

5. Mamoru Aihara (3 out of 10 patents)

6. Toshio Shimizu (3 out of 5 patents)

7 patents: Sort by Forward Citations

1. 7048031 - Apparatus for casting dental prosthesis (2006-05-23),

2. 6488074 - Apparatus for casting dental prosthesis (2002-12-03),

3. 6441345 - Wax spatula apparatus (2002-08-27),

4. 6386265 - Method of and apparatus for casting dental prosthesis (2002-05-14),

5. D336336 - Crystallization furnace for dental prostheses (1993-06-08),

6. D335539 - Casting machine for dental prostheses (1993-05-11),

7. D335537 - Crystallization furnace for dental prostheses (1993-05-11),

Company Overview

Denken Co., Ltd. is a technology company specializing in providing innovative solutions for businesses across various industries. With a strong focus on research and development, Denken Co., Ltd. offers cutting-edge software products and services to help clients streamline their operations and improve efficiency. From custom software development to IT consulting, Denken Co., Ltd. delivers tailor-made solutions to meet the unique needs of each client.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

7 Patents

#141 in Kyoto 615-0031

#5,456 in Japan

Kyoto, Japan

Denken Co., Ltd.

Forward Citations = 32

6 inventors:

Masaki Usui (4 out of 5 patents)

Kazuhiro Watanabe (3 out of 135 patents)

Manabu Takahashi (3 out of 46 patents)

4. Yasuharu Hakamatsuka (3 out of 19 patents)

5. Mamoru Aihara (3 out of 10 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Denken Co., Ltd.. Retrieved from https://idiyas.com/company/denken-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]