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For the Inventor, By the Inventor

Grandville, MI, United States of America

Hadley Products

Calculating rank
USPTO Granted Patents = 17

% Expired Patents = 5.9


Trademarks = 2

Forward Citations = 183

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17 inventors (with patents filed for the assignee):

goldMedal Curtis A Trudeau (10 out of 10 patents)

silverMedal Dick E Winter (7 out of 7 patents)

bronzeMedal 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:

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),
Company Overview
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 synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

17 Patents

#5 in Grandville, MI

#682 in Michigan

#18,913 in US

#35,974 in the World

Grandville, MI (US)
Grandville, MI, United States of America

Hadley Products

Forward Citations = 183

17 inventors:

goldMedal Curtis A Trudeau (10 out of 10 patents)

silverMedal Dick E Winter (7 out of 7 patents)

bronzeMedal 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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hadley Products. Retrieved from https://idiyas.com/company/hadley-products

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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