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For the Inventor, By the Inventor

Tokyo, Japan

Nippon Seiko K.k.


USPTO Granted Patents = 12

Forward Citations = 184

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24 inventors (with patents filed for the assignee):

goldMedal Yasuo Murakami (2 out of 50 patents)

silverMedal Hiromi Sugi (2 out of 6 patents)

bronzeMedal Kyozaburo Furumura (2 out of 16 patents)

4.  Hiromitsu Asai (2 out of 5 patents)

5.  Yoshihiro Yokote (1 out of 36 patents)

6.  Hiroshi Eda (1 out of 34 patents)

7.  Shigeki Furutani (1 out of 10 patents)

8.  Nobuyuki Osawa (1 out of 31 patents)

9.  Isamu Chikuma (1 out of 26 patents)

10.  Mikio Yamaguchi (1 out of 16 patents)

11.  Naoki Mitsue (1 out of 9 patents)

12.  Hirotaka Kanazawa (1 out of 36 patents)

13.  Noriyoshi Tsurugi (1 out of 1 patent)

14.  Yasushi Kato (1 out of 1 patent)

15.  Shigeji Ogata (1 out of 2 patents)


12 patents:

1. 5128571 - Hard disk driving motor (1992-07-07),
2. 5054524 - Solid-color weave pattern belt (1991-10-08),
3. D307834 - Child car seat (1990-05-15),
4. 4664414 - Automatic latch device for a movable runner member used in an automatic (1987-05-12),
5. 4621702 - Four-wheel steering apparatus of a vehicle (1986-11-11),
6. 4598914 - Sealing and bearing means by use of ferrofluid (1986-07-08),
7. 4516783 - Seal assembly with radially overlapping seal means (1985-05-14),
8. 4486026 - Sealing and bearing means by use of ferrofluid (1984-12-04),
9. 4476741 - Tilt type steering device (1984-10-16),
10. 4472003 - Track guide bearing assembly (1984-09-18),
11. 4471701 - Connecting mechanism of an XY table (1984-09-18),
12. 4007630 - Device for detecting damage on rotators (1977-02-15),
Company Overview
Nippon Seiko K.K., headquartered in Tokyo, specializes in the development and manufacturing of precision instruments and components. The company is recognized for its expertise in various technology domains, including optical devices, electronic components, and advanced manufacturing processes. With a strong focus on innovation, Nippon Seiko K.K. serves a diverse range of industries, contributing to advancements in technology and enhancing product performance across multiple sectors.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

12 Patents

#1,729 in Tokyo

#3,936 in Japan

#48,209 in the World

Tokyo, JP
Tokyo, Japan

Nippon Seiko K.k.

Forward Citations = 184

24 inventors:

goldMedal Yasuo Murakami (2 out of 50 patents)

silverMedal Hiromi Sugi (2 out of 6 patents)

bronzeMedal Kyozaburo Furumura (2 out of 16 patents)

4.  Hiromitsu Asai (2 out of 5 patents)

5.  Yoshihiro Yokote (1 out of 36 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nippon Seiko K.k.. Retrieved from https://idiyas.com/company/nippon-seiko-k-k

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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