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Tomoe Engineering Co., Ltd.

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USPTO Granted Patents = 20

% Expired Patents = 40.0

EPO Patents = 10

Trademarks = 1

Forward Citations = 56

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28 inventors (with patents filed for the assignee):

Masaru Nagasu (3 out of 3 patents)

Kenji Morita (3 out of 129 patents)

Tatsuo Hiramatsu (3 out of 3 patents)

4. Koji Fujimoto (2 out of 9 patents)

5. Jun Ohashi (2 out of 10 patents)

6. Atsushi Onodera (2 out of 14 patents)

7. Takao Yoshida (2 out of 12 patents)

8. Saihei Yano (2 out of 2 patents)

9. Katsuya Ando (1 out of 1 patent)

10. Masahiro Ide (1 out of 5 patents)

11. Mamoru Hasegawa (1 out of 18 patents)

12. Nobukazu Hosokai (1 out of 4 patents)

13. Yoshihiro Teruya (1 out of 3 patents)

14. Tetsuya Tsugawa (1 out of 1 patent)

15. Kokichi Dohi (1 out of 1 patent)

20 patents: Sort by Forward Citations

1. 12121913 - Centrifuge having removable wear-resistant sleeve installed at a solids discharge port of a bowl (2024-10-22),

2. 11707749 - Centrifuge including rotatable bowl and conical separation discs arranged in the bowl (2023-07-25),

3. 11413630 - Centrifugal apparatus having a bowl with extension lugs and wear-resistant sleeves (2022-08-16),

4. D895699 - Rotor cover for disc type centrifugal separator (2020-09-08),

5. 10525484 - Decanter centrifuge having a dilution solvent supply unit and method for operating a decanter centrifuge (2020-01-07),

6. 10201788 - Polymer flocculant mixing and dissolving system configured to control pressure on discharge side of regenerative mixer and method thereof (2019-02-12),

7. 9463474 - Centrifugal separator equipped with separated liquid jetting device including jet nozzle and release port (2016-10-11),

8. 9238233 - Centrifugal separator with shaft sealing mechanism for a centrifugal separation bowl rotatable within a casing (2016-01-19),

9. 9212076 - Sludge processing system and storage medium storing a program for controlling operation of a sludge processing system based on moisture content of concentrated sludge (2015-12-15),

10. 9206064 - Sludge processing system and storage medium storing a program for controlling operation of a sludge processing system based on correlation between moisture content of concentrated sludge, centrifugal force, and concentrated sludge convey torque (2015-12-08),

11. 9089853 - Vertical centrifugal separation apparatus supportable in multiple overturn positions (2015-07-28),

12. 9005097 - Vertical centrifugal separator (2015-04-14),

13. 8652021 - Decanter-type centrifugal separator equipped with continuous lubricant supply device including an oil collector configured to revolve in a predetermined direction causing the lubricant to flow into the lubricant supply path (2014-02-18),

14. 8529425 - Horizontal centrifugal separator in which the hermeticity of a casing is improved by using a sealing element having a simple structure (2013-09-10),

15. 7670276 - Decanter type centrifugal separator with torque transmission mechanism (2010-03-02),

Company Overview

Tomoe Engineering Co., Ltd. is a prominent Japanese company specializing in the development and manufacturing of advanced engineering solutions. The organization focuses on various sectors, including industrial machinery, environmental systems, and energy technologies. With a commitment to innovation, Tomoe Engineering leverages cutting-edge research to enhance operational efficiency and sustainability in its offerings. The company plays a significant role in supporting industries in Japan and beyond, contributing to technological advancements and environmental stewardship.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 10 2026

20 Patents

#1,349 in Tokyo

#2,954 in Japan

#31,380 in the World

Tomoe Engineering Co., Ltd.

Forward Citations = 56

28 inventors:

Masaru Nagasu (3 out of 3 patents)

Kenji Morita (3 out of 129 patents)

Tatsuo Hiramatsu (3 out of 3 patents)

4. Koji Fujimoto (2 out of 9 patents)

5. Jun Ohashi (2 out of 10 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tomoe Engineering Co., Ltd.. Retrieved from https://idiyas.com/company/tomoe-engineering-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]

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