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Oval Engineering Co., Ltd.

USPTO Granted Patents = 20

Trademarks = 1

Forward Citations = 233

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29 inventors (with patents filed for the assignee):

Masao Misumi (6 out of 7 patents)

Naoki Matsubara (4 out of 25 patents)

Koji Atsumi (3 out of 4 patents)

4. Yutaka Ogawa (3 out of 14 patents)

5. Yoshiaki Asayama (3 out of 41 patents)

6. Shigeyoshi Nagata (2 out of 8 patents)

7. Hideo Numata (2 out of 3 patents)

8. Shunichi Wada (2 out of 69 patents)

9. Naoki Matubara (2 out of 2 patents)

10. Hideo Murakami (2 out of 2 patents)

11. Masami Kabuto (2 out of 4 patents)

12. Teruki Fukami (2 out of 2 patents)

13. Kuniteru Okuda (2 out of 2 patents)

14. Akira Tsukada (1 out of 14 patents)

15. Kenichi Matsuoka (1 out of 6 patents)

20 patents: Sort by Forward Citations

1. 5392632 - Small volume prover (1995-02-28),

2. 5317895 - Flowmeter proving apparatus (1994-06-07),

3. 5222395 - Thermal type flowmeter (1993-06-29),

4. 5193399 - Vortex flowmeter (1993-03-16),

5. 5167450 - Calorimeter (1992-12-01),

6. 4977781 - Vortex flow meter (1990-12-18),

7. 4974780 - Ultrasonic fuel injection nozzle (1990-12-04),

8. 4970902 - Karman's vortex flow meter (1990-11-20),

9. 4969808 - Elastic tubing pump (1990-11-13),

10. 4891989 - Vortex flow meter (1990-01-09),

11. 4838092 - Vortex flow meter (1989-06-13),

12. 4683760 - Vortex flow meter (1987-08-04),

13. 4627295 - Vortex flow meter (1986-12-09),

14. 4625564 - Vortex flow meter (1986-12-02),

15. 4526040 - Oscillation compensating apparatus for vortex flow meter (1985-07-02),

Oval Engineering Co., Ltd. is a leading engineering firm specializing in innovative solutions for industrial projects. With a team of highly skilled engineers and state-of-the-art technology, we provide a wide range of services including design, fabrication, and installation. Our commitment to quality and customer satisfaction has earned us a strong reputation in the industry.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

20 Patents

#1,170 in Tokyo

#2,882 in Japan

#30,316 in the World

Oval Engineering Co., Ltd.

Forward Citations = 233

29 inventors:

Masao Misumi (6 out of 7 patents)

Naoki Matsubara (4 out of 25 patents)

Koji Atsumi (3 out of 4 patents)

4. Yutaka Ogawa (3 out of 14 patents)

5. Yoshiaki Asayama (3 out of 41 patents)

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