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Koa Oil Company, Limited

USPTO Granted Patents = 26

CIPO Patents = 1

Forward Citations = 242

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43 inventors (with patents filed for the assignee):

Kosaku Noguchi (12 out of 12 patents)

Honami Tanaka (8 out of 8 patents)

Eiji Kitajima (7 out of 8 patents)

4. Yukimasa Kumura (5 out of 5 patents)

5. Masaki Fujii (4 out of 6 patents)

6. Okiyoshi Okamura (4 out of 4 patents)

7. Kiyoharu Yoshimura (4 out of 4 patents)

8. Masanori Minohata (3 out of 5 patents)

9. Yoshihito Tamanoi (3 out of 3 patents)

10. Hirokazu Teraoka (3 out of 4 patents)

11. Masao Hayashi (3 out of 3 patents)

12. Tomonori Sunada (3 out of 3 patents)

13. Susumu Shimizu (2 out of 27 patents)

14. Haruki Yamasaki (2 out of 8 patents)

15. Takashi Oyama (2 out of 3 patents)

26 patents: Sort by Forward Citations

1. 5883036 - Olefin oligomerization catalyst, process for preparing the same, and (1999-03-16),

2. 5798459 - Subject identification method, apparatus and system (1998-08-25),

3. 5476730 - Air cell (1995-12-19),

4. 5462816 - Air cell (1995-10-31),

5. 5240785 - Air cell (1993-08-31),

6. 5204030 - Method for producing pitch-type carbon fiber (1993-04-20),

7. 5190696 - Process for preparation of carbonaceous molded body having excellent (1993-03-02),

8. 5183603 - Process for producing a coil-shaped carbon fiber bundle (1993-02-02),

9. 5137667 - Process for producing elastic graphite molded products (1992-08-11),

10. 5057297 - Method for producing elastic graphite structures (1991-10-15),

11. 5017358 - Preparation of elastic graphite materials (1991-05-21),

12. 4828682 - Coking process (1989-05-09),

13. 4769139 - Apparatus for production of crystallizable carbonaceous material (1988-09-06),

14. 4640822 - Apparatus for producing bulk mesophase (1987-02-03),

15. 4488957 - Method and apparatus for production of crystallizable carbonaceous (1984-12-18),

Koa Oil Company, Limited is a leading global energy company specializing in the exploration, production, refining, and distribution of petroleum products. With a rich history spanning over 50 years, we have established ourselves as a trusted name in the energy industry. Our commitment to innovation, sustainability, and safety sets us apart from the competition. Visit our website to learn more about our operations, products, and corporate values.

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

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USPTO Data Jan 1 1976 - Dec 9 2025

26 Patents

#1,019 in Tokyo

#2,456 in Japan

#24,051 in the World

Koa Oil Company, Limited

Forward Citations = 242

43 inventors:

Kosaku Noguchi (12 out of 12 patents)

Honami Tanaka (8 out of 8 patents)

Eiji Kitajima (7 out of 8 patents)

4. Yukimasa Kumura (5 out of 5 patents)

5. Masaki Fujii (4 out of 6 patents)

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