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Tokyo Gas Company Limited

USPTO Granted Patents = 193

CIPO Patents = 10

EPO Patents = 19

Trademarks = 2

Forward Citations = 1,936

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384 inventors (with patents filed for the assignee):

Tadashi Kohno (16 out of 16 patents)

Isaburo Hosoi (16 out of 16 patents)

Masaaki Itagaki (15 out of 15 patents)

4. Shigeru Toyoda (15 out of 16 patents)

5. Kunihiko Shibata (14 out of 14 patents)

6. Shuichi Yagi (14 out of 14 patents)

7. Asuka Ito (12 out of 16 patents)

8. Kiichi Suyama (11 out of 11 patents)

9. Satoshi Yamashita (8 out of 25 patents)

10. Yoshio Matsuzaki (8 out of 8 patents)

11. Junko Hirayama (8 out of 8 patents)

12. Junko Ohshima (8 out of 8 patents)

13. Mitsutoshi Hayashi (8 out of 8 patents)

14. Kenji Maeda (7 out of 41 patents)

15. Akio Morinaga (7 out of 13 patents)

Core Competencies:

Fuel Cell System

Methane Production

Carbon Dioxide Recovery

Gas Meter System

Seismic Sensor

Hydrogen Separation

Solid Oxide Fuel Cell

Diagnostic Agents

Acoustic Communication

Diamond Ultraviolet Device

Nondestructive Reading

Low-NOx Burner

193 patents: Sort by Forward Citations

1. 12401052 - Fuel cell system and method of reprocessing off-gas (2025-08-26),

2. 11787753 - Methane production apparatus, methane production method, carbon dioxide recovery apparatus, and carbon dioxide recovery method (2023-10-17),

3. 11710841 - Reaction device and fuel cell power generation system (2023-07-25),

4. 11710837 - Fuel cell system including a separation membrane (2023-07-25),

5. 11581559 - Carbon dioxide production system (2023-02-14),

6. 11047720 - Gas meter system and heating value estimation method (2021-06-29),

7. 10971747 - Fuel cell system and fuel cell control program (2021-04-06),

8. 10739476 - Seismic sensor and earthquake determination method (2020-08-11),

9. 10655068 - Gas meter system and heating value derivation method (2020-05-19),

10. 10613056 - Heating value derivation device and heating value derivation method (2020-04-07),

11. 10497944 - Fuel cell unit (2019-12-03),

12. 10105678 - Oxygen adsorbent, oxygen manufacturing equipment using the oxygen adsorbent and oxygen manufacturing method (2018-10-23),

13. 9568412 - Method and instrumentation for measuring and assessing AC corrosion risk of pipeline (2017-02-14),

14. 9350030 - Fuel cell module (2016-05-24),

15. 9279313 - Device and method for sequestering a substance (2016-03-08),

Tokyo Gas Company Limited is a Japanese energy company that supplies natural gas and other energy solutions to residential, commercial, and industrial customers in Japan. With over 135 years of experience, Tokyo Gas has become one of the largest gas utilities in the country. They are committed to providing clean and reliable energy while promoting environmental sustainability and innovation. Visit their website for more information.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

193 Patents

#318 in Tokyo

#703 in Japan

#4,234 in the World

Tokyo Gas Company Limited

Forward Citations = 1,936

384 inventors:

Tadashi Kohno (16 out of 16 patents)

Isaburo Hosoi (16 out of 16 patents)

Masaaki Itagaki (15 out of 15 patents)

4. Shigeru Toyoda (15 out of 16 patents)

5. Kunihiko Shibata (14 out of 14 patents)

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