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Hokkaido, Japan

Hokkaido Electric Power Company, Inc.

USPTO Granted Patents = 19

EPO Patents = 5

Forward Citations = 97

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77 inventors (with patents filed for the assignee):

Noriyuki Tatsumi (4 out of 8 patents)

Norio Homma (4 out of 4 patents)

Jiro Tsujino (4 out of 4 patents)

4. Yoshinori Koyama (3 out of 38 patents)

5. Shoji Tanaka (3 out of 79 patents)

6. Tadataka Morishita (3 out of 16 patents)

7. Atsushi Kume (3 out of 10 patents)

8. Katsuhiko Yokohama (2 out of 17 patents)

9. Hiromi Takahashi (2 out of 18 patents)

10. Yasunari Shibata (2 out of 21 patents)

11. Shuji Kameyama (2 out of 2 patents)

12. Hideyuki Kondo (2 out of 10 patents)

13. Tsutomu Ueno (2 out of 2 patents)

14. Yasuji Yamada (2 out of 14 patents)

15. Shinji Kawamoto (2 out of 2 patents)

19 patents: Sort by Forward Citations

1. 12127566 - Method for suppressing greening (2024-10-29),

2. 9239164 - Slag monitoring device for coal gasifier and coal gasifier (2016-01-19),

3. 8997665 - Slag-melting burner apparatus (2015-04-07),

4. 8637784 - Method for improving residual stress in tubular body (2014-01-28),

5. 7871586 - Mercury removal system and method (2011-01-18),

6. 7780143 - Gate valve (2010-08-24),

7. 5998050 - Composite metal oxide material (1999-12-07),

8. 5747427 - Process for forming a semiconductive thin film containing a junction (1998-05-05),

9. 5731271 - Method for preparing an oxide superconducting tape (1998-03-24),

10. 5679625 - Method of making an oxide superconducting thin film (1997-10-21),

11. 5627142 - Method of producing composite metal oxide material (1997-05-06),

12. 5560894 - Process for treatment of exhaust gas (1996-10-01),

13. 5453306 - Process for depositing oxide film on metallic substrate by heat plasma (1995-09-26),

14. 5376309 - Boride materials for electronic elements and method of preparing the same (1994-12-27),

15. 5225393 - Process for forming thin oxide film (1993-07-06),

Hokkaido Electric Power Company, Inc. (HEPCO) is a publicly listed electric utility company based in Sapporo, Japan. It serves as the primary provider of electricity in Hokkaido, the northernmost island of Japan. With a focus on reliability, sustainability, and innovation, HEPCO aims to meet the energy needs of the region while minimizing environmental impact. The company is committed to promoting renewable energy sources and enhancing energy efficiency in order to build a more sustainable future.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

19 Patents

#6 in Hokkaido

#2,973 in Japan

#31,687 in the World

Hokkaido, Japan

Hokkaido Electric Power Company, Inc.

Forward Citations = 97

77 inventors:

Noriyuki Tatsumi (4 out of 8 patents)

Norio Homma (4 out of 4 patents)

Jiro Tsujino (4 out of 4 patents)

4. Yoshinori Koyama (3 out of 38 patents)

5. Shoji Tanaka (3 out of 79 patents)

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