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For the Inventor, By the Inventor

Yokohama, Japan

Nhk Spring, Ltd.

Calculating rank
USPTO Granted Patents = 54

% Expired Patents = 1.9


Forward Citations = 1

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132 inventors (with patents filed for the assignee):

goldMedal Shuji Takahashi (6 out of 57 patents)

silverMedal Fumito Kitanaka (6 out of 12 patents)

bronzeMedal Kensuke Yoshiga (4 out of 9 patents)

4.  Masafumi Takano (4 out of 8 patents)

5.  Yosuke Ishiyama (4 out of 5 patents)

6.  Masato Fukushima (4 out of 6 patents)

7.  Yukinori Mikita (3 out of 4 patents)

8.  Tatsuhiko Nishida (3 out of 21 patents)

9.  Yuki Hayakawa (3 out of 9 patents)

10.  Kenzo Yasuda (3 out of 10 patents)

11.  Yoshio Yamada (3 out of 22 patents)

12.  Kenji Nagumo (3 out of 9 patents)

13.  Yuki Hotoda (3 out of 3 patents)

14.  Takafumi Hirata (3 out of 3 patents)

15.  Masao Hanya (2 out of 56 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

54 patents:

1. 12770652 - Disk drive suspension (2026-10-20),
2. 12770651 - Manufacturing method of a disk drive suspension (2026-10-20),
3. 12770650 - Disk drive suspension, adjustment method of vibration characteristics of the same, and manufacturing method of the same (2026-10-20),
4. 12767034 - Locking mechanism (2026-10-20),
5. 12761246 - Probe card for electrically connecting test target and circuit to generate a test signal (2026-10-13),
6. 12760830 - Pulsation-damping member (2026-10-13),
7. 12759442 - Driver's seat heater and automobile driver's seat (2026-10-13),
8. D1151411 - Automobile headrest (2026-10-06),
9. 12752370 - Laser welding apparatus and laser welding method (2026-10-06),
10. 12746695 - Bending structure and method for producing same (2026-09-29),
11. 12741573 - Vehicle seat (2026-09-22),
12. 12741405 - Motor core manufacturing device and motor core manufacturing method (2026-09-22),
13. 12734943 - Vehicle seat (2026-09-15),
14. 12732040 - Rotor and dynamo-electric machine (2026-09-08),
15. 12730128 - Measurement unit (2026-09-08),
Company Overview
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 synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

54 Patents

#33 in Yokohama

#1,630 in Japan

#13,140 in the World

Yokohama, JP
Yokohama, Japan

Nhk Spring, Ltd.

Forward Citations = 1

132 inventors:

goldMedal Shuji Takahashi (6 out of 57 patents)

silverMedal Fumito Kitanaka (6 out of 12 patents)

bronzeMedal Kensuke Yoshiga (4 out of 9 patents)

4.  Masafumi Takano (4 out of 8 patents)

5.  Yosuke Ishiyama (4 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nhk Spring, Ltd.. Retrieved from https://idiyas.com/company/nhk-spring

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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