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For the Inventor, By the Inventor

Itasca, IL, United States of America

Hendrickson USA, L L.c.


USPTO Granted Patents = 251

% Expired Patents = 11.6



Trademarks = 52

Forward Citations = 2,010

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172 inventors (with patents filed for the assignee):

goldMedal Shawn D Noble (46 out of 47 patents)

silverMedal Ashley Thomas Dudding (44 out of 57 patents)

bronzeMedal Jay D White (36 out of 43 patents)

4.  John Edward Ramsey (24 out of 34 patents)

5.  Phillippi R Pierce (18 out of 24 patents)

6.  Michael P Robinson (17 out of 18 patents)

7.  R Scott Fulton (16 out of 18 patents)

8.  Damon Elwood Dilworth (16 out of 17 patents)

9.  Andrew J Westnedge (15 out of 17 patents)

10.  Jesse W Cervantez (14 out of 17 patents)

11.  Matthew J Van Meter (14 out of 15 patents)

12.  Michael J Keeler (13 out of 26 patents)

13.  Hormoz Kerendian (13 out of 13 patents)

14.  William Wilson (11 out of 22 patents)

15.  Jerome Lim Cortez (11 out of 11 patents)


Core Competencies:
Slack Adjuster Assembly
Lift Axle Suspension
Damping Air Spring
Axle Connection
Suspension System
Tire Inflation System
Hub and Rotor Assembly
Brake Component
Pneumatic Suspension
Self-Steering Axle
Multi-Functional Bushing
Heavy-Duty Vehicle

251 patents:

1. 12449013 - Slack adjuster assembly for heavy-duty vehicles (2025-10-21),
2. 12427826 - Control apparatus for lift axle/suspension systems of heavy-duty vehicles (2025-09-30),
3. 12403737 - Lift axle suspension systems with lift paddle (2025-09-02),
4. 12391082 - Axle-to-beam connection for heavy-duty vehicle axle/suspension systems (2025-08-19),
5. 12370861 - Torque rod for vehicle suspension (2025-07-29),
6. 12370850 - Wishbone-shaped linkage and modular bushing assembly and suspension systems incorporating the same (2025-07-29),
7. 12337637 - Clamp group and round axle with alignment features (2025-06-24),
8. 12305728 - Slack adjuster assembly for heavy-duty vehicles (2025-05-20),
9. 12291064 - Damping air spring for heavy-duty vehicle axle/suspension systems (2025-05-06),
10. 12280618 - Rotary union with energy harvesting structure (2025-04-21),
11. 12179536 - Under beam lift assembly for heavy-duty vehicles (2024-12-31),
12. 12163565 - Process for manufacturing a leaf spring and insert for leaf spring (2024-12-10),
13. 12115814 - Axle for heavy-duty vehicles (2024-10-15),
14. 11891141 - Knuckle for a self-steering axle/suspension system (2024-02-06),
15. 11865862 - Hub and rotor assembly (2024-01-09),
Company Overview
Hendrickson USA, L.L.C., based in Itasca, Illinois, specializes in the development and manufacturing of advanced suspension systems for heavy-duty vehicles. The company focuses on key technologies such as slack adjuster assemblies, lift axle suspensions, and damping air springs, contributing to enhanced vehicle performance and safety. Hendrickson's expertise extends to tire inflation systems and brake components, positioning it as a leader in the heavy-duty transportation sector, dedicated to innovation and quality in vehicle dynamics.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Hendrickson USA, L L.c. USPTO Patent Assignee Logo
251 Patents

#3 in Itasca, IL

#106 in Illinois

#1,705 in US

#3,472 in the World

Itasca, IL (US)
Itasca, IL, United States of America

Hendrickson USA, L L.c.

Forward Citations = 2,010

172 inventors:

goldMedal Shawn D Noble (46 out of 47 patents)

silverMedal Ashley Thomas Dudding (44 out of 57 patents)

bronzeMedal Jay D White (36 out of 43 patents)

4.  John Edward Ramsey (24 out of 34 patents)

5.  Phillippi R Pierce (18 out of 24 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hendrickson USA, L L.c.. Retrieved from https://idiyas.com/company/hendrickson-usa-l-l-c

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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