% Expired Patents = 20.0

Forward Citations = 18

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18 inventors (with patents filed for the assignee):

Koji Yamanaka (2 out of 71 patents)

Yoshikazu Nagamura (2 out of 15 patents)

Nobuyuki Yoshioka (2 out of 42 patents)

4. Hozumi Usui (2 out of 3 patents)

5. Masaki Kusuhara (1 out of 19 patents)

6. Masaru Umeda (1 out of 38 patents)

7. Masao Kikuchi (1 out of 39 patents)

8. Hiroyuki Watanabe (1 out of 67 patents)

9. Jinichi Omi (1 out of 6 patents)

10. Kunio Sugiyama (1 out of 2 patents)

11. Shuichi Tada (1 out of 1 patent)

12. Tadahiro Nakada (1 out of 1 patent)

13. Hirofumi Uehara (1 out of 1 patent)

14. Keiko Sanpei (1 out of 1 patent)

15. Masaru Nakamura (1 out of 2 patents)

5 patents: Sort by Forward Citations

1. 7140201 - Method for producing silica particles (2006-11-28),

2. 7077915 - Method of and apparatus for washing photomask and washing solution for photomask (2006-07-18),

3. 6888041 - Decomposition apparatus of organic compound, decomposition method thereof, excimer UV lamp and excimer emission apparatus (2005-05-03),

4. 6071376 - Method and apparatus for cleaning photomask (2000-06-06),

5. 5138105 - Process and apparatus for recovering a lower alcohol from a mixture (1992-08-11),

Company Overview

M. Watanabe Co., Ltd. is a leading company specializing in the manufacturing and distribution of high-quality industrial products. Established in Japan, the company has built a strong reputation for innovation and excellence in various sectors, including automotive, electronics, and machinery. With a commitment to sustainability and customer satisfaction, M. Watanabe Co., Ltd. continuously invests in research and development to enhance its product offerings and meet the evolving needs of its clients. The company prides itself on its skilled workforce and state-of-the-art facilities, ensuring that all products meet rigorous quality standards. M. Watanabe Co., Ltd. aims to expand its global presence while maintaining its core values of integrity, reliability, and service.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

5 Patents

#2,721 in Tokyo

#6,654 in Japan

Tokyo, Japan

M. Watanabe Co., Ltd.

Forward Citations = 18

18 inventors:

Koji Yamanaka (2 out of 71 patents)

Yoshikazu Nagamura (2 out of 15 patents)

Nobuyuki Yoshioka (2 out of 42 patents)

4. Hozumi Usui (2 out of 3 patents)

5. Masaki Kusuhara (1 out of 19 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: M. Watanabe Co., Ltd.. Retrieved from https://idiyas.com/company/m-watanabe-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]