For the Inventor, By the Inventor

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Grandville, MI, United States of America

Hadley Products

USPTO Granted Patents = 17

% Expired Patents = 5.9

CIPO Patents = 2

Trademarks = 2

Forward Citations = 183

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17 inventors (with patents filed for the assignee):

Curtis A Trudeau (10 out of 10 patents)

Dick E Winter (7 out of 7 patents)

Gary L Schafer (6 out of 7 patents)

4. Robert D Sorum (4 out of 4 patents)

5. Loralye Sorum, Legal Representative (3 out of 3 patents)

6. Robert C Dattilo (3 out of 3 patents)

7. Karl H Hanft (2 out of 4 patents)

8. Edward A Gahan (2 out of 4 patents)

9. David N Sizemore (2 out of 3 patents)

10. Mark W Lempke (2 out of 2 patents)

11. Jaret M Shawl (2 out of 2 patents)

12. Kirk A Lilly (2 out of 2 patents)

13. Christopher M Dutton (1 out of 4 patents)

14. Mark W Pierce (1 out of 8 patents)

15. Henry M Anderson, Jr (1 out of 9 patents)

17 patents: Sort by Forward Citations

1. D897912 - Vehicular component linkage member (2020-10-06),

2. D897911 - Vehicular component linkage member (2020-10-06),

3. D727219 - Vehicular component linkage member (2015-04-21),

4. 7887065 - Height control valve for vehicle leveling system (2011-02-15),

5. 7419199 - Exterior rearview mirror with turn signal (2008-09-02),

6. 7389994 - Vehicle leveling system (2008-06-24),

7. 7261304 - Vehicle leveling system (2007-08-28),

8. 7126458 - Sliding axle alarm (2006-10-24),

9. 6857646 - Anti-roll suspension valve body (2005-02-22),

10. 6832143 - Drive train vibration control system (2004-12-14),

11. 6672730 - Vehicular exterior rearview mirror assembly with actuator (2004-01-06),

12. 6669217 - Anti-roll suspension valve body (2003-12-30),

13. 6516741 - Leak proof apparatus for mounting components to panels (2003-02-11),

14. 6488383 - Vehicular exterior rearview mirror assembly with actuator (2002-12-03),

15. 5860450 - Height control valve for vehicle leveling system (1999-01-19),

Hadley Products, based in Grandville, MI, specializes in the design and manufacture of innovative solutions for the transportation industry. The company focuses on developing advanced components and systems that enhance vehicle performance and safety. With a commitment to quality and engineering excellence, Hadley Products serves a diverse range of clients, providing cutting-edge technology in areas such as air suspension systems and electronic controls. Their expertise supports various applications, ensuring reliability and efficiency in transportation solutions.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

17 Patents

#5 in Grandville, MI

#681 in Michigan

#18,865 in US

#35,857 in the World

Grandville, MI, United States of America

Hadley Products

Forward Citations = 183

17 inventors:

Curtis A Trudeau (10 out of 10 patents)

Dick E Winter (7 out of 7 patents)

Gary L Schafer (6 out of 7 patents)

4. Robert D Sorum (4 out of 4 patents)

5. Loralye Sorum, Legal Representative (3 out of 3 patents)

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