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For the Inventor, By the Inventor

Mooresville, NC, United States of America

Simpson Performance Products, Inc.


USPTO Granted Patents = 17

% Expired Patents = 5.9


Forward Citations = 69

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8 inventors (with patents filed for the assignee):

goldMedal Trevor P Ashline (12 out of 14 patents)

silverMedal Mark Anthony Stiles (2 out of 7 patents)

bronzeMedal Glenn Stasky (1 out of 1 patent)

4.  Thomas A Darnell (1 out of 1 patent)

5.  Anna Marie Frey (1 out of 4 patents)

6.  Steve Drabant (1 out of 2 patents)

7.  David J Nelson (1 out of 1 patent)

8.  Russell J Somers (1 out of 1 patent)

9.  James R Downing (8 patents)


17 patents:

1. D1144027 - Seatbelt link (2026-08-25),
2. D1142134 - SEATBELT LINK (2026-08-18),
3. D1142018 - SEATBELT LINK (2026-08-18),
4. D1141850 - SEATBELT LINK (2026-08-18),
5. D1061332 - Seatbelt latch (2025-02-11),
6. D1061331 - Seatbelt latch (2025-02-11),
7. D1061214 - Seatbelt latch (2025-02-11),
8. D1060119 - Seatbelt latch (2025-02-04),
9. 10828962 - Compact cooling system for vehicle operators (2020-11-10),
10. 10537147 - Multi-point tethering system for head and neck restraint devices (2020-01-21),
11. 9415711 - Adjustable head and neck support device (2016-08-16),
12. 9351529 - Multi-point tethering system for head and neck restraint devices (2016-05-31),
13. 8850625 - Head and neck support device (2014-10-07),
14. 8539648 - Quick detach shackle (2013-09-24),
15. 8375472 - Multi-point tethering system for head and neck restraint devices (2013-02-19),
Simpson Performance Products, Inc. is a leading manufacturer of racing safety equipment, including helmets, suits, gloves, and more. With over 60 years of experience, Simpson is trusted by professional drivers worldwide to provide top-quality products that prioritize safety and performance on the track.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Simpson Performance Products, Inc.
17 Patents

#4 in Mooresville, NC

#417 in North Carolina

#18,865 in US

#35,857 in the World

Mooresville, NC (US)
Mooresville, NC, United States of America

Simpson Performance Products, Inc.

Forward Citations = 69

8 inventors:

goldMedal Trevor P Ashline (12 out of 14 patents)

silverMedal Mark Anthony Stiles (2 out of 7 patents)

bronzeMedal Glenn Stasky (1 out of 1 patent)

4.  Thomas A Darnell (1 out of 1 patent)

5.  Anna Marie Frey (1 out of 4 patents)

Please report any incorrect information to [email protected]
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