For the Inventor, By the Inventor

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Ann Arbor, MI, United States of America

G. T. Products, Inc.

USPTO Granted Patents = 27

Forward Citations = 829

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11 inventors (with patents filed for the assignee):

Robert Philip Benjey (17 out of 70 patents)

Rudolph Bergsma (16 out of 24 patents)

Lindsey E Waldorf (3 out of 11 patents)

4. Vaughn Kevin Mills (2 out of 64 patents)

5. Paul Douglas Walkowski (1 out of 13 patents)

6. Duane M Schliebe (1 out of 1 patent)

7. Pete Belanger (1 out of 1 patent)

8. Matthew Villemure (1 out of 1 patent)

9. Bryce Schwager (1 out of 1 patent)

10. Gary H Leadford (1 out of 1 patent)

11. Joseph B Newton (1 out of 1 patent)

Core Competencies:

ORVR Control Valve

Vapor Recovery System

Fuel Tank Vent

Shutoff Valve

Diaphragm Valve

Check Valve

Float Valve

Mechanical Seal

Butterfly Check Valve

Resistor Card Sender

Fluid-Responsive Control

Roll-Over Closure

27 patents: Sort by Forward Citations

1. 6206057 - Two-stage ORVR control valve (2001-03-27),

2. 6062276 - Two-stage ORVR control valve (2000-05-16),

3. 5983958 - Onboard vapor recovery system with two stage shutoff valve (1999-11-16),

4. 5960816 - Adjustable length vent valve system for fuel tanks (1999-10-05),

5. 5954091 - Retaining structure for a fuel tank mounted valve body (1999-09-21),

6. 5954082 - Apparatus and method for calibrating float valve (1999-09-21),

7. 5950655 - Mechanical seal ORVR system and control valve (1999-09-14),

8. 5860458 - Two-stage ORVR control valve (1999-01-19),

9. 5797434 - Onboard vapor recovery system with two-stage shutoff valve (1998-08-25),

10. 5755252 - Control valve with two-stage shutoff and peel away opening action (1998-05-26),

11. 5590697 - Onboard vapor recovery system with two-stage shutoff valve (1997-01-07),

12. 5524662 - Fuel tank vent system and diaphragm valve for such system (1996-06-11),

13. 5518026 - Filler neck butterfly check valve (1996-05-21),

14. 5417240 - Cap sensitive head valve for vehicle fuel system (1995-05-23),

15. 5404907 - Weldable vapor vent valve for fuel tanks (1995-04-11),

Company Overview

G. T. Products, Inc., based in Ann Arbor, MI, specializes in the development and manufacturing of advanced materials and innovative solutions for various industries. The company focuses on creating high-performance products that enhance efficiency and sustainability in applications ranging from automotive to industrial sectors. With a commitment to research and development, G. T. Products leverages cutting-edge technology to address complex challenges and deliver reliable solutions tailored to client needs.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

27 Patents

#34 in Ann Arbor, MI

#455 in Michigan

#12,420 in US

#24,012 in the World

Ann Arbor, MI, United States of America

G. T. Products, Inc.

Forward Citations = 829

11 inventors:

Robert Philip Benjey (17 out of 70 patents)

Rudolph Bergsma (16 out of 24 patents)

Lindsey E Waldorf (3 out of 11 patents)

4. Vaughn Kevin Mills (2 out of 64 patents)

5. Paul Douglas Walkowski (1 out of 13 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: G. T. Products, Inc.. Retrieved from https://idiyas.com/company/g-t-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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