For the Inventor, By the Inventor

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Houston, TX, United States of America

Hughes Tool Company-usa

USPTO Granted Patents = 31

Trademarks = 1

Forward Citations = 981

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34 inventors (with patents filed for the assignee):

Bruce H Burr (4 out of 12 patents)

Eric Charles Sullivan (3 out of 91 patents)

William W King (2 out of 52 patents)

4. Danny Eugene Scott (2 out of 171 patents)

5. Louis H Barnard (2 out of 4 patents)

6. David M Nguyen (2 out of 5 patents)

7. Joseph L Kelly, Jr (2 out of 7 patents)

8. George E Dolezal (2 out of 10 patents)

9. Robert A Cunningham (2 out of 6 patents)

10. Mig A Howard (2 out of 6 patents)

11. Rudolf Carl Pessier (1 out of 92 patents)

12. Edward M Galle, Sr (1 out of 8 patents)

13. Igor Krasnov (1 out of 21 patents)

14. James R Hall (1 out of 4 patents)

15. Gerald O Atkinson (1 out of 5 patents)

31 patents: Sort by Forward Citations

1. 4793422 - Articulated elevator links for top drive drill rig (1988-12-27),

2. 4788544 - Well bore data transmission system (1988-11-29),

3. 4775016 - Downhole pressure fluctuating feedback system (1988-10-04),

4. 4759415 - Rock bit with improved extended nozzle (1988-07-26),

5. 4753303 - Earth boring bit with two piece bearing and rigid face seal assembly (1988-06-28),

6. 4741471 - Method for manufacturing a rotary rock bit (1988-05-03),

7. 4726432 - Differentially hardfaced rock bit (1988-02-23),

8. 4703814 - Earth boring bit having a replaceable, threaded nozzle with wrench socket (1987-11-03),

9. 4696354 - Drilling bit with full release void areas (1987-09-29),

10. 4694855 - Drill pipe inside blowout preventer (1987-09-22),

11. 4685359 - Method of hardfacing steel bodied bits (1987-08-11),

12. 4671368 - Earth boring bit with shear compression seal (1987-06-09),

13. 4667756 - Matrix bit with extended blades (1987-05-26),

14. 4666001 - Earth boring bit with improved rigid face seal assembly (1987-05-19),

15. 4664722 - Method for protecting from hardening a selected region of a steel (1987-05-12),

Hughes Tool Company is a leading provider of oilfield equipment and services. With a legacy dating back over a century, the company specializes in drilling tools, drilling fluids, and related equipment. Our innovative solutions help oil and gas companies optimize their drilling operations and increase efficiency. Visit our website to learn more.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

31 Patents

#166 in Houston, TX

#598 in Texas

#10,550 in US

#20,626 in the World

Houston, TX, United States of America

Hughes Tool Company-usa

Forward Citations = 981

34 inventors:

Bruce H Burr (4 out of 12 patents)

Eric Charles Sullivan (3 out of 91 patents)

William W King (2 out of 52 patents)

4. Danny Eugene Scott (2 out of 171 patents)

5. Louis H Barnard (2 out of 4 patents)

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