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For the Inventor, By the Inventor

Yokohama, Japan

Nhk Spring, Ltd.


USPTO Granted Patents = 47

% Expired Patents = 2.1


Forward Citations = 1

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118 inventors (with patents filed for the assignee):

goldMedal Fumito Kitanaka (5 out of 11 patents)

silverMedal Kensuke Yoshiga (4 out of 9 patents)

bronzeMedal Shuji Takahashi (4 out of 55 patents)

4.  Masafumi Takano (4 out of 8 patents)

5.  Yukinori Mikita (3 out of 4 patents)

6.  Yuki Hayakawa (3 out of 9 patents)

7.  Kenji Nagumo (3 out of 9 patents)

8.  Yosuke Ishiyama (3 out of 4 patents)

9.  Masato Fukushima (3 out of 5 patents)

10.  Yuki Hotoda (3 out of 3 patents)

11.  Takafumi Hirata (3 out of 3 patents)

12.  Masao Hanya (2 out of 56 patents)

13.  Jun Shirai (2 out of 10 patents)

14.  Toshihiko Hanamachi (2 out of 21 patents)

15.  Kenzo Yasuda (2 out of 9 patents)


Core Competencies:
Vehicle Seat
Coil Spring
Disk Drive Suspension
Motor Core
Bending Structure
Measurement Unit
Engine Control
Watch Processing
Work Cleaning Device
Temperature Measuring
Stator
Flexible Structure

47 patents:

1. D1151411 - Automobile headrest (2026-10-06),
2. 12752370 - Laser welding apparatus and laser welding method (2026-10-06),
3. 12746695 - Bending structure and method for producing same (2026-09-29),
4. 12741573 - Vehicle seat (2026-09-22),
5. 12741405 - Motor core manufacturing device and motor core manufacturing method (2026-09-22),
6. 12734943 - Vehicle seat (2026-09-15),
7. 12732040 - Rotor and dynamo-electric machine (2026-09-08),
8. 12730128 - Measurement unit (2026-09-08),
9. 12729738 - Coil spring (2026-09-08),
10. 12725173 - Watch authenticity information processing system (2026-09-01),
11. 12723816 - Plate with flow channel (2026-09-01),
12. 12715566 - Engine control apparatus (2026-08-25),
13. 12713535 - CIRCUIT BOARD AND MANUFACTURING METHOD (2026-08-18),
14. 12711991 - WORK CLEANING DEVICE AND CLEANING METHOD (2026-08-18),
15. 12706115 - Temperature measuring unit, disk drive suspension manufacturing apparatus, and disk drive suspension manufacturing method (2026-08-11),
Nhk Spring, Ltd. is a prominent Japanese manufacturer specializing in the development and production of springs, automotive components, and precision machinery. The company focuses on advanced engineering solutions, catering to various industries including automotive, electronics, and industrial machinery. With a commitment to innovation, Nhk Spring invests in research and development to enhance product performance and sustainability, positioning itself as a key player in the global market for high-quality mechanical components.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

47 Patents

#35 in Yokohama

#1,775 in Japan

#14,803 in the World

Yokohama, JP
Yokohama, Japan

Nhk Spring, Ltd.

Forward Citations = 1

118 inventors:

goldMedal Fumito Kitanaka (5 out of 11 patents)

silverMedal Kensuke Yoshiga (4 out of 9 patents)

bronzeMedal Shuji Takahashi (4 out of 55 patents)

4.  Masafumi Takano (4 out of 8 patents)

5.  Yukinori Mikita (3 out of 4 patents)

Please report any incorrect information to [email protected]
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