For the Inventor, By the Inventor

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Houston, TX, United States of America

Gray Tool Company

USPTO Granted Patents = 23

Forward Citations = 275

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16 inventors (with patents filed for the assignee):

Michael A Karr, Jr (6 out of 12 patents)

Charles D Bridges (5 out of 38 patents)

Frank C Adamek (4 out of 19 patents)

4. John K McGee (3 out of 20 patents)

5. Robert E Bush (2 out of 4 patents)

6. Charles Hays (2 out of 3 patents)

7. James R Dickson (1 out of 14 patents)

8. Charles Edward Jennings (1 out of 61 patents)

9. John M Zwiegel (1 out of 2 patents)

10. Boyd D Boitnott (1 out of 1 patent)

11. James Vaull Bonds (1 out of 5 patents)

12. Neil Karlskind (1 out of 1 patent)

13. Warren D King (1 out of 1 patent)

14. Vernon G Stewart (1 out of 1 patent)

15. John P Mitcham (1 out of 1 patent)

23 patents: Sort by Forward Citations

1. 4643390 - Fail-safe valve actuator (1987-02-17),

2. 4627958 - Densification of metal powder to produce cladding of valve interiors by (1986-12-09),

3. 4612983 - Shear type gate valve (1986-09-23),

4. 4570724 - Stepwise rotary actuator (1986-02-18),

5. 4570659 - Fire resistant valve (1986-02-18),

6. 4569503 - Valve with remote and manual actuation means (1986-02-11),

7. 4562090 - Method for improving the density, strength and bonding of coatings (1985-12-31),

8. 4556076 - Fire resistant valve (1985-12-03),

9. 4553589 - Fire-safe surface-controlled subsurface safety valve control (1985-11-19),

10. 4552369 - Stem sealing for high pressure valve (1985-11-12),

11. 4540012 - Temperature sensitive valve bonnet assembly (1985-09-10),

12. 4534235 - Rotary stepper actuator (1985-08-13),

13. 4511002 - Multiple tubing hanger tie back system and method (1985-04-16),

14. 4483545 - Fire resistant connections and double ribbed sealing means therefor (1984-11-20),

15. 4477093 - Fire resistant connections and T-like sealing means therefor (1984-10-16),

Gray Tool Company is a leading manufacturer of high-quality industrial tools. With over 50 years of experience, we specialize in making durable and reliable tools for a wide range of industries. Our products are known for their precision, efficiency, and exceptional performance. We are committed to providing our customers with the best tools to help them achieve success in their work.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

23 Patents

#230 in Houston, TX

#846 in Texas

#13,953 in US

#26,826 in the World

Houston, TX, United States of America

Gray Tool Company

Forward Citations = 275

16 inventors:

Michael A Karr, Jr (6 out of 12 patents)

Charles D Bridges (5 out of 38 patents)

Frank C Adamek (4 out of 19 patents)

4. John K McGee (3 out of 20 patents)

5. Robert E Bush (2 out of 4 patents)

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