For the Inventor, By the Inventor

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Tukwila, WA, United States of America

Gt Development Corporation

USPTO Granted Patents = 34

% Expired Patents = 2.9

Trademarks = 1

Forward Citations = 1,952

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16 inventors (with patents filed for the assignee):

John Michael Morris (23 out of 38 patents)

Alan K Forsythe (15 out of 20 patents)

Charles J Green (11 out of 15 patents)

4. Zdenek Gabrlik (6 out of 6 patents)

5. Charles E Stephens (2 out of 10 patents)

6. Charles H Simmons, Jr (2 out of 2 patents)

7. Andrew F Thompson (2 out of 2 patents)

8. Timothy L Oliphant (2 out of 4 patents)

9. Denny Gabrlik (2 out of 2 patents)

10. Gabe Fasolino (1 out of 2 patents)

11. Brent L LaRiviere (1 out of 1 patent)

12. Scott F Coomes (1 out of 1 patent)

13. Roger St John (1 out of 1 patent)

14. Kurt Ambruster (1 out of 1 patent)

15. Nelson O Phillips (1 out of 1 patent)

Core Competencies:

Knob Attachment Assembly

Deformable Fastener

Magnetic Reed Switches

Solenoid-Actuated Valve

Pressure Protection Valve

Air-Operated Devices

HVAC Fluid Control

Vapor Recovery Systems

Flow Divider

Pneumatic Seat Valve

Vehicle Safety Vent

Gas Venting Valve

34 patents: Sort by Forward Citations

1. 7380309 - Knob attachment assembly (2008-06-03),

2. 7210669 - Deformable fastener (2007-05-01),

3. 7164335 - Switch assembly employing magnetic reed switches (2007-01-16),

4. 7106158 - Solenoid-actuated air valve (2006-09-12),

5. 6971404 - Pressure protection valve (2005-12-06),

6. 6860292 - Control system for air-operated devices (2005-03-01),

7. 6719000 - Two stage fuel tank vent valve (2004-04-13),

8. 6175290 - Contactless stalk mounted control switch (2001-01-16),

9. 6119727 - Pneumatic seat valve having a rapid exhaust mode (2000-09-19),

10. 6085786 - Cyclic flow valve (2000-07-11),

11. 5590736 - Vehicle pneumatic seat rollover safety vent valve (1997-01-07),

12. 5573034 - Center position biased slide air valve (1996-11-12),

13. 5564520 - Pneumatic seat rollover vent valve (1996-10-15),

14. 5467960 - Two-way HVAC fluid control valve (1995-11-21),

15. 5447178 - Center position biased slide air valve (1995-09-05),

Company Overview

Gt Development Corporation, based in Tukwila, WA, specializes in advanced technology solutions and product development across various sectors. The company focuses on innovative engineering and design, providing services that enhance operational efficiency and product performance. With a commitment to research and development, Gt Development engages in cutting-edge projects that span multiple domains, including aerospace, automotive, and industrial applications, positioning itself as a key player in the technology landscape.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

34 Patents

#1 in Tukwila, WA

#213 in Washington

#10,022 in US

#19,651 in the World

Tukwila, WA, United States of America

Gt Development Corporation

Forward Citations = 1,952

16 inventors:

John Michael Morris (23 out of 38 patents)

Alan K Forsythe (15 out of 20 patents)

Charles J Green (11 out of 15 patents)

4. Zdenek Gabrlik (6 out of 6 patents)

5. Charles E Stephens (2 out of 10 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gt Development Corporation. Retrieved from https://idiyas.com/company/gt-development

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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