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Doryokuro Kakunenryo Kaihatsu Jigyodan

USPTO Granted Patents = 196

Forward Citations = 1,597

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429 inventors (with patents filed for the assignee):

Katsuyuki Ohtsuka (12 out of 12 patents)

Yukio Wada (8 out of 9 patents)

Jin Ohuchi (8 out of 8 patents)

4. Hiroshi Igarashi (7 out of 9 patents)

5. Isao Kondoh (7 out of 7 patents)

6. Hiroaki Kobayashi (6 out of 8 patents)

7. Minoru Gunji (6 out of 6 patents)

8. Takashi Okada (6 out of 6 patents)

9. Yoshiharu Takahashi (5 out of 5 patents)

10. Akio Todokoro (5 out of 5 patents)

11. Mitsuru Kamei (4 out of 5 patents)

12. Noriaki Sasaki (4 out of 5 patents)

13. Hajime Kataoka (4 out of 4 patents)

14. Keiichiro Otomura (4 out of 4 patents)

15. Kiyozumi Hayashi (4 out of 4 patents)

Core Competencies:

Object Search

Sodium Leakage Detection

Radioactive Rays Detection

Groundwater Sampling

Plasma Jet Torch

Optical Sensor

Radioactive Waste Treatment

Seismic Isolation Structure

Hydrogen Generation

Nuclear Fuel Decontamination

Raman Laser Apparatus

Isotope Enrichment

196 patents: Sort by Forward Citations

1. 6072495 - Object search method and object search system (2000-06-06),

2. 6067337 - Multiple-sheathed sodium leakage detection apparatus (2000-05-23),

3. 6020619 - Radioactive rays detection semiconductor device (2000-02-01),

4. 5965003 - Method of decomposing CMPO (1999-10-12),

5. 5896926 - Packer type groundwater sampling system and water sampling method (1999-04-27),

6. 5880426 - Indirectly-cooled plasma jet torch (1999-03-09),

7. 5869626 - Metal-encapsulated fullerene compound and a method of synthesizing such (1999-02-09),

8. 5859436 - Method for determining photonuclear reaction cross section and (1999-01-12),

9. 5838843 - Multipurpose optical sensor (1998-11-17),

10. 5834867 - Electromagnetic rotary vibrator and damper for a rotary body (1998-11-10),

11. 5826203 - Method for solidifying waste containing radioactive iodine (1998-10-20),

12. 5767400 - Hydraulic test system mounted with borehole television set for (1998-06-16),

13. 5753177 - High-Ni austenitic stainless steel having excellent high-temperature (1998-05-19),

14. 5744020 - Process for treatment of radioactive waste (1998-04-28),

15. 5740216 - Vertical seismic isolation structure of common deck system for nuclear (1998-04-14),

Doryokuro Kakunenryo Kaihatsu Jigyodan (DKK) is a Japanese organization specializing in the development and management of nuclear power plants. With over five decades of experience and expertise, DKK has contributed significantly to Japan's energy sector. Their comprehensive capabilities span various areas such as plant design, construction, maintenance, and decommissioning. DKK prioritizes safety, efficiency, and sustainability in all their projects, ensuring secure and reliable power generation for both domestic and international clients. Visit their website to explore their range of services and learn more about their commitment to sustainable energy solutions.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

196 Patents

#312 in Tokyo

#694 in Japan

#4,182 in the World

Doryokuro Kakunenryo Kaihatsu Jigyodan

Forward Citations = 1,597

429 inventors:

Katsuyuki Ohtsuka (12 out of 12 patents)

Yukio Wada (8 out of 9 patents)

Jin Ohuchi (8 out of 8 patents)

4. Hiroshi Igarashi (7 out of 9 patents)

5. Isao Kondoh (7 out of 7 patents)

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