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For the Inventor, By the Inventor

Fujisawa, Japan

Shiroki Corporation


USPTO Granted Patents = 212

% Expired Patents = 23.6



Trademarks = 2

Forward Citations = 868

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176 inventors (with patents filed for the assignee):

goldMedal Hidehiko Fujioka (16 out of 18 patents)

silverMedal Kenji Yamamoto (15 out of 118 patents)

bronzeMedal Noriaki Maeda (13 out of 44 patents)

4.  Naoki Hayashi (11 out of 114 patents)

5.  Atsushi Muramatsu (9 out of 11 patents)

6.  Nobumasa Higashi (9 out of 9 patents)

7.  Kazutaka Sasaki (9 out of 17 patents)

8.  Kimihiro Kinoshita (9 out of 11 patents)

9.  Jun Makita (9 out of 9 patents)

10.  Jiro Yoshihara (8 out of 8 patents)

11.  Kenji Shimizu (7 out of 72 patents)

12.  Kazuya Yokoyama (7 out of 8 patents)

13.  Hiroaki Yamazaki (7 out of 63 patents)

14.  Tomohiro Enokijima (7 out of 8 patents)

15.  Shigenobu Ohsawa (7 out of 7 patents)


Core Competencies:
Clutch Unit
Window Regulator
Seat Reclining Apparatus
Vehicle Door Frame
Slide Device
Vehicle Seat
Drive Device
Sash Coupling Structure
Deceleration Device
Seat Track
Wire Type Window Regulator
Exterior Structure

212 patents:

1. 11708012 - Clutch unit for vehicle (2023-07-25),
2. 11614145 - Gear device (2023-03-28),
3. 11390192 - Slide device for vehicle seat (2022-07-19),
4. 11332047 - Slide device (2022-05-17),
5. 11292369 - Seat apparatus (2022-04-05),
6. 11279209 - Vehicle door glass elevating/lowering device, door frame assembly, vehicle door opening/closing member driving device, and vehicle door opening/closing member driving device assembling method (2022-03-22),
7. 11273690 - Door sash (2022-03-15),
8. 11251680 - Deceleration device (2022-02-15),
9. 11235683 - Vehicle seat slide apparatus (2022-02-01),
10. 11149802 - Clutch unit for vehicle (2021-10-19),
11. 11142104 - Reclining device (2021-10-12),
12. 11142098 - Vehicle seat slide apparatus (2021-10-12),
13. 11136810 - Window regulator and method of assembling the same (2021-10-05),
14. 11136809 - Window regulator and method of assembling the same (2021-10-05),
15. 11136803 - Window regulator and method of assembling the same (2021-10-05),
Shiroki Corporation, headquartered in Fujisawa, Japan, specializes in the development and manufacturing of advanced vehicle components. The company focuses on key technologies such as clutch units, window regulators, and seat reclining apparatuses, contributing to the automotive industry's innovation and efficiency. With a strong emphasis on quality and performance, Shiroki plays a vital role in enhancing vehicle functionality through its diverse product offerings, including drive devices and vehicle door frames.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Shiroki Corporation
212 Patents

#1 in Fujisawa

#682 in Japan

#4,010 in the World

Fujisawa, JP
Fujisawa, Japan

Shiroki Corporation

Forward Citations = 868

176 inventors:

goldMedal Hidehiko Fujioka (16 out of 18 patents)

silverMedal Kenji Yamamoto (15 out of 118 patents)

bronzeMedal Noriaki Maeda (13 out of 44 patents)

4.  Naoki Hayashi (11 out of 114 patents)

5.  Atsushi Muramatsu (9 out of 11 patents)

Please report any incorrect information to [email protected]
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