For the Inventor, By the Inventor

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Kalamazoo, MI, United States of America

Humphrey Products Company

USPTO Granted Patents = 27

Trademarks = 3

Forward Citations = 423

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18 inventors (with patents filed for the assignee):

Thomas H Tinholt (8 out of 8 patents)

Robert Brian Knepple (5 out of 9 patents)

Mark William Friedman (5 out of 9 patents)

4. Vytautas J Toliusis (5 out of 5 patents)

5. Stanley M Loveless (4 out of 8 patents)

6. Scott Klien (3 out of 3 patents)

7. David T Klien (3 out of 3 patents)

8. Leonard Joseph Jabcon (2 out of 5 patents)

9. Matthew Welker (2 out of 2 patents)

10. Marc R Larson (1 out of 1 patent)

11. Robert A Kracker (1 out of 1 patent)

12. Jeffrey J Elsesser (1 out of 1 patent)

13. Todd Bordewyk (1 out of 1 patent)

14. Scott Davis (1 out of 1 patent)

15. Kurt Miedema (1 out of 1 patent)

27 patents: Sort by Forward Citations

1. 12359739 - Expandable sealing sleeve with rigid support (2025-07-15),

2. 11708883 - Actuator assembly with electric motor for extending and retracting a pusher (2023-07-25),

3. 11662038 - Modular valve assembly (2023-05-30),

4. 10279439 - Method of making a valve system for a valve asembly (2019-05-07),

5. 10228072 - Valve stem and assembly (2019-03-12),

6. 9494245 - Over-molded valve stem and method of making a valve stem for a valve assembly (2016-11-15),

7. 8794266 - Cam actuated valve assembly with manual and electric activation (2014-08-05),

8. 8528597 - Actuator and valve assembly (2013-09-10),

9. 8186978 - Pump with linear actuator (2012-05-29),

10. 8019469 - Networkable zone control modules and method and conveyor system incorporating the same (2011-09-13),

11. 7591365 - Networkable zone control modules and method and conveyor system incorporating the same (2009-09-22),

12. 7448411 - Actuator and valve assembly (2008-11-11),

13. 7280889 - Networkable zone control modules and method and coveyor system incorporating the same (2007-10-09),

14. 6488050 - Pneumatic valve assembly (2002-12-03),

15. 6405757 - Low power solenoid valve assembly (2002-06-18),

Humphrey Products Company is a leading manufacturer of pneumatic valves and actuators, serving a wide range of industries including automotive, medical, and packaging. With over 100 years of experience, Humphrey offers innovative solutions for fluid control and motion control applications. Visit their website for more information and to explore their product catalog.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

27 Patents

#13 in Kalamazoo, MI

#440 in Michigan

#12,007 in US

#23,290 in the World

Kalamazoo, MI, United States of America

Humphrey Products Company

Forward Citations = 423

18 inventors:

Thomas H Tinholt (8 out of 8 patents)

Robert Brian Knepple (5 out of 9 patents)

Mark William Friedman (5 out of 9 patents)

4. Vytautas J Toliusis (5 out of 5 patents)

5. Stanley M Loveless (4 out of 8 patents)

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