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For the Inventor, By the Inventor

Nagano, Japan

Minebea Kabushiki-Kaisha

Calculating rank
USPTO Granted Patents = 52

% Expired Patents = 21.2


Forward Citations = 301

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29 inventors (with patents filed for the assignee):

goldMedal Rikuro Obara (39 out of 80 patents)

silverMedal Katashi Tatsuno (7 out of 7 patents)

bronzeMedal Hiroshi Yoshikawa (5 out of 8 patents)

4.  Yutaka Daikuhara (4 out of 7 patents)

5.  Yuzuru Suzuki (2 out of 115 patents)

6.  Eiichi Kobayashi (2 out of 2 patents)

7.  Toshisada Koyama (1 out of 17 patents)

8.  Takuya Yamamoto (1 out of 7 patents)

9.  Sakae Fujitani (1 out of 57 patents)

10.  Yasuhiro Mouri (1 out of 3 patents)

11.  Shigenori Hoya (1 out of 5 patents)

12.  Noriyuki Yoshimura (1 out of 24 patents)

13.  Yuichi Murakami (1 out of 2 patents)

14.  Hiroyuki Yajima (1 out of 3 patents)

15.  Hideki Matsuoka (1 out of 5 patents)


Core Competencies:
Spindle Motor
Hard Disk Drive
Anti-Friction Bearing
Compound Bearing
Electric Drive Motor
Ball Bearing
Bearing Assembly
Sealing Assembly
Fan Blower
Rotary Machine
Double Seal Bearing
Stainless Steel

52 patents:

1. 7056030 - Pivot bearing for a swing arm of a hard disk drive device (2006-06-06),
2. 6916160 - Axial electric fan blower with electric components housing sealed from moisture, dirt and dust or other harmful gas (2005-07-12),
3. 6794774 - Spindle motor (2004-09-21),
4. 6734591 - Spindle motor (2004-05-11),
5. 6688772 - Retainer for ball bearing, and ball bearing including the same (2004-02-10),
6. 6599022 - Bearing apparatus (2003-07-29),
7. 6599021 - Compound bearing apparatus (2003-07-29),
8. 6599020 - Double seal bearing (2003-07-29),
9. 6582129 - Compound bearing apparatus, and spindle motor and swing arm for hard disk drive means including such bearing apparatus (2003-06-24),
10. 6563243 - Spindle motor (2003-05-13),
11. 6556375 - Hard disk drive device (2003-04-29),
12. 6538354 - Spindle motor with toroidal sealing plates (2003-03-25),
13. 6512316 - Spindle motor (2003-01-28),
14. 6511303 - Fan blower with durable bearing structure (2003-01-28),
15. 6474871 - Anti-friction bearing and a motor including such a bearing (2002-11-05),
Company Overview
Minebea Kabushiki-Kaisha, headquartered in Nagano, Japan, specializes in advanced bearing technology and precision components. The company is recognized for its innovative developments in spindle motors, hard disk drives, and various types of bearings, including anti-friction and compound bearings. Minebea's expertise extends to electric drive motors and bearing assemblies, catering to a diverse range of industries. With a commitment to quality and technological advancement, Minebea plays a pivotal role in enhancing the performance and reliability of mechanical systems globally.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

52 Patents

#26 in Nagano

#1,673 in Japan

#13,579 in the World

Nagano, JP
Nagano, Japan

Minebea Kabushiki-Kaisha

Forward Citations = 301

29 inventors:

goldMedal Rikuro Obara (39 out of 80 patents)

silverMedal Katashi Tatsuno (7 out of 7 patents)

bronzeMedal Hiroshi Yoshikawa (5 out of 8 patents)

4.  Yutaka Daikuhara (4 out of 7 patents)

5.  Yuzuru Suzuki (2 out of 115 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Minebea Kabushiki-Kaisha. Retrieved from https://idiyas.com/company/minebea-kabushiki-kaisha

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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