For the Inventor, By the Inventor

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Tulsa, OK, United States of America

T. D. Williamson, Inc.

USPTO Granted Patents = 18

Trademarks = 27

Forward Citations = 295

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18 inventors (with patents filed for the assignee):

Larry D Payne (3 out of 4 patents)

Gene R Ralls (3 out of 9 patents)

Burton Ver Nooy (3 out of 3 patents)

4. James B Sullivan (2 out of 40 patents)

5. Hyun J Cho (2 out of 4 patents)

6. Buddy A Wilson (1 out of 6 patents)

7. Jack D Lollis (1 out of 2 patents)

8. Dennis R Smith (1 out of 5 patents)

9. David J Hicks (1 out of 4 patents)

10. Jeffrey S Rosenberg (1 out of 7 patents)

11. Kevin W Lockyear (1 out of 2 patents)

12. William J Rankin (1 out of 3 patents)

13. Robert L Kendall (1 out of 1 patent)

14. Kishor N Mehta (1 out of 1 patent)

15. Hershel Vanzant (1 out of 1 patent)

18 patents: Sort by Forward Citations

1. 4953412 - Pipeline caliper pig (1990-09-04),

2. 4797239 - Foam pig with textured surface (1989-01-10),

3. 4780962 - Pipeline bend verification pig (1988-11-01),

4. 4720884 - Cleaning pig with debris flushing action (1988-01-26),

5. 4693278 - Safety closure member (1987-09-15),

6. 4609209 - Precise alignment adapter flange (1986-09-02),

7. 4596204 - Flag-type pig-sig (1986-06-24),

8. 4579484 - Underwater tapping machine (1986-04-01),

9. 4522063 - Methods and apparatus for indicating selected physical parameters in a (1985-06-11),

10. 4515287 - Pressure activated closure lock (1985-05-07),

11. 4466550 - Closure for a cylindrical opening having improved venting means (1984-08-21),

12. 4457073 - Pipeline pig having improved means of sensing changes in the internal (1984-07-03),

13. 4413370 - Unitary pig for use in a pipeline (1983-11-08),

14. 4411459 - Branch fitting for providing access to the interior of a pipe (1983-10-25),

15. 4387740 - Cam-flange (1983-06-14),

T. D. Williamson, Inc. is a global leader in pipeline maintenance and integrity solutions. With over a century of experience, the company offers innovative technologies and services to ensure the safe and efficient operation of pipelines worldwide. From pigging and hot tapping to integrity management and leak detection, T.D. Williamson delivers industry-leading solutions to help customers optimize their pipeline assets.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

18 Patents

#35 in Tulsa, OK

#82 in Oklahoma

#17,382 in US

#33,147 in the World

Tulsa, OK, United States of America

T. D. Williamson, Inc.

Forward Citations = 295

18 inventors:

Larry D Payne (3 out of 4 patents)

Gene R Ralls (3 out of 9 patents)

Burton Ver Nooy (3 out of 3 patents)

4. James B Sullivan (2 out of 40 patents)

5. Hyun J Cho (2 out of 4 patents)

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