CIPO Patents = 11

Forward Citations = 196

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26 inventors (with patents filed for the assignee):

Toshio Kobayashi (3 out of 116 patents)

Kazuyoshi Takayama (2 out of 19 patents)

Hiromitsu Yamamoto (2 out of 3 patents)

4. Masahiro Nakamura (1 out of 1 patent)

5. Takeyoshi Nozawa (1 out of 1 patent)

6. Saburo Goto (1 out of 1 patent)

7. Kozo Ishida (1 out of 1 patent)

8. Kiyonobu Ohtani (1 out of 1 patent)

9. Satoru Umezu (1 out of 1 patent)

10. Ken-ichi Ueda (1 out of 1 patent)

11. Kazuhisa Otomo (1 out of 1 patent)

12. Shigehito Uetake (1 out of 1 patent)

13. Eiji Kogure (1 out of 1 patent)

14. Shohei Kato (1 out of 1 patent)

15. Hiroyasu Ishiguro (1 out of 1 patent)

7 patents: Sort by Forward Citations

1. 8474519 - Methane hydrate dissociation accelerating and methane gas deriving system (2013-07-02),

2. 8256530 - Method of processing rock with laser and apparatus for the same (2012-09-04),

3. 7802384 - Method and device for excavating submerged stratum (2010-09-28),

4. 6870128 - Laser boring method and system (2005-03-22),

5. 6386299 - Method and apparatus for reaming pilot hole (2002-05-14),

6. 6217258 - Dual hoist derrick system for deep sea drilling (2001-04-17),

7. 4729746 - Buoy having excellent resistance against external pressure (1988-03-08),

Japan Drilling Co., Ltd. is a leading provider of drilling services for the oil and gas industry. With over 50 years of experience, the company offers a wide range of drilling services including onshore and offshore drilling, well construction, well intervention, and well abandonment. Japan Drilling Co., Ltd. is committed to safety, innovation, and environmental sustainability in all of its operations.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

7 Patents

#2,034 in Tokyo

#5,301 in Japan

Tokyo, Japan

Japan Drilling Co., Ltd.