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For the Inventor, By the Inventor

Tokyo, Japan

Nitto Kohki Co., Ltd.


USPTO Granted Patents = 323

% Expired Patents = 5.6



Trademarks = 24

Forward Citations = 6,207

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147 inventors (with patents filed for the assignee):

goldMedal Toshio Mikiya (63 out of 80 patents)

silverMedal Osamu Asano (20 out of 22 patents)

bronzeMedal Hirosato Takeuchi (19 out of 19 patents)

4.  Michihiro Shoji (16 out of 16 patents)

5.  Kenji Fukuda (15 out of 26 patents)

6.  Reichi Makishima (15 out of 15 patents)

7.  Yasuo Kazama (14 out of 14 patents)

8.  Hiroyuki Kitagawa (13 out of 18 patents)

9.  Katsunobu Kishi (13 out of 13 patents)

10.  Takeya Sasa (13 out of 13 patents)

11.  Haruki Nakao (12 out of 17 patents)

12.  Naoyuki Kotake (12 out of 12 patents)

13.  Keisuke Shimada (11 out of 11 patents)

14.  Yoshikazu Kobayashi (11 out of 23 patents)

15.  Koji Matsumoto (10 out of 120 patents)


Core Competencies:
Pipe Coupling
Air Pump
Power Tool
Clutch Mechanism
Check Valve
Electric Screwdriver
Pneumatic Tool
Portable Drilling Machine
Fluid Recovery Apparatus
Electromagnetic Valve
Suction Nozzle
Vane Air Motor

323 patents:

1. 12498067 - Piping member (2025-12-16),
2. 12422076 - Pipe joint assembly (2025-09-23),
3. 12305633 - Pump (2025-05-20),
4. 12129897 - Clutch mechanism and power tool (2024-10-29),
5. D1036507 - Air pump (2024-07-23),
6. 11873933 - Pipe coupling member (2024-01-16),
7. 11795939 - Pump installation member (2023-10-24),
8. 11761566 - Connecting pipe (2023-09-19),
9. 11701766 - Tool, and control circuit and control method therefor (2023-07-18),
10. 11530768 - Pipe coupling having valve element and coil spring for use therein (2022-12-20),
11. 11486373 - Pump (2022-11-01),
12. D962294 - Air pump (2022-08-30),
13. D946626 - Pump (2022-03-22),
14. 11118717 - Male coupling member (2021-09-14),
15. 11105453 - Pipe coupling member having valve element and coil spring for use therein (2021-08-31),
NITTO KOHKI CO., LTD. is a global leader in the manufacturing and distribution of high-quality pneumatic products and hydraulic equipment. With over six decades of experience, the company offers a wide range of innovative tools and solutions for various industries. NITTO KOHKI's product lineup includes air compressors, couplings, vacuum pumps, hydraulic pumps, and electric power tools. The company is committed to providing reliable and efficient products that meet the highest standards of performance and safety. Visit their website for more information.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 15 2026

Nitto Kohki Co., Ltd.
323 Patents

#265 in Tokyo

#515 in Japan

#2,790 in the World

Tokyo, JP
Tokyo, Japan

Nitto Kohki Co., Ltd.

Forward Citations = 6,207

147 inventors:

goldMedal Toshio Mikiya (63 out of 80 patents)

silverMedal Osamu Asano (20 out of 22 patents)

bronzeMedal Hirosato Takeuchi (19 out of 19 patents)

4.  Michihiro Shoji (16 out of 16 patents)

5.  Kenji Fukuda (15 out of 26 patents)

Please report any incorrect information to [email protected]
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