% Expired Patents = 40.0

Trademarks = 2

Forward Citations = 10

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18 inventors (with patents filed for the assignee):

Satoshi Arakawa (1 out of 13 patents)

Makoto Saito (1 out of 100 patents)

Kenichi Noda (1 out of 11 patents)

4. Satoshi Yawata (1 out of 1 patent)

5. Ai Shimomura (1 out of 1 patent)

6. Yukimasa Shimura (1 out of 14 patents)

7. Yuko Konno (1 out of 6 patents)

8. Shintarou Mori (1 out of 4 patents)

9. Emiko Kaneko (1 out of 1 patent)

10. Junichi Isoe (1 out of 1 patent)

11. Makoto Satoda (1 out of 1 patent)

12. Ryozo Goto (1 out of 1 patent)

13. Shinichi Akazawa (1 out of 1 patent)

14. Masao Mizuno (1 out of 1 patent)

15. Setsuko Kamada (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 10851141 - Mutant beetle luciferase, gene, recombinant vector, transformant, and method for preparing mutant beetle luciferase (2020-12-01),

2. D728399 - Water quality analyzer (2015-05-05),

3. 7659512 - Oil type discrimination method and oil type discriminator (2010-02-09),

4. 7416899 - Method and apparatus for measuring trace ingredients in water (2008-08-26),

5. 6734021 - Method and apparatus for measuring organic carbon content (2004-05-11),

Company Overview

DKK-TOA Corporation is a leading company in the field of environmental measurement and analysis equipment. With a focus on innovation and quality, they provide solutions for measuring air quality, water quality, and noise levels. Their products are trusted by professionals and industries around the world for accurate and reliable results.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

5 Patents

#2,721 in Tokyo

#6,652 in Japan

Tokyo, Japan

Dkk-Toa Corporation

Forward Citations = 10

18 inventors:

Satoshi Arakawa (1 out of 13 patents)

Makoto Saito (1 out of 100 patents)

Kenichi Noda (1 out of 11 patents)

4. Satoshi Yawata (1 out of 1 patent)

5. Ai Shimomura (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dkk-Toa Corporation. Retrieved from https://idiyas.com/company/dkk-toa

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]