For the Inventor, By the Inventor

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Longview, TX, United States of America

Marathon Letourneau Company

USPTO Granted Patents = 9

Trademarks = 1

Forward Citations = 182

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17 inventors (with patents filed for the assignee):

Dwight Baker (3 out of 5 patents)

Ronald A Johnston (2 out of 22 patents)

Erwin F Stoldt (2 out of 2 patents)

4. Gary L Nelson (2 out of 2 patents)

5. Donald W Schaper (2 out of 2 patents)

6. William T Martin (1 out of 3 patents)

7. Julian F Bowes (1 out of 2 patents)

8. Richard D Baney (1 out of 1 patent)

9. Glenn A Shankle (1 out of 1 patent)

10. Paul L Kelsey (1 out of 1 patent)

11. Donald M Cross (1 out of 1 patent)

12. Clyde H Wilson (1 out of 1 patent)

13. James A Dupuy (1 out of 3 patents)

14. Duel J Tarrant (1 out of 1 patent)

15. Rudy M Harris (1 out of 1 patent)

9 patents: Sort by Forward Citations

1. 5351775 - Method for propelling and retarding off-road haulers (1994-10-04),

2. 5103923 - Method and apparatus for propelling and retarding off-road haulers (1992-04-14),

3. 5038702 - Semi-submersible platform (1991-08-13),

4. 4981186 - Truck load weighing method and apparatus (1991-01-01),

5. 4747745 - Selective beam gantry crane (1988-05-31),

6. 4587383 - Electrically powered mobile apparatus and method with suspended power (1986-05-06),

7. 4273242 - Stabilizing device (1981-06-16),

8. 4135628 - Hoisting apparatus with improved anti-sway system (1979-01-23),

9. 3945450 - Apparatus and method for rendering an offshore drilling platform self (1976-03-23),

Marathon Letourneau Company specializes in manufacturing heavy-duty drilling equipment for the offshore and land drilling industry. They offer a wide range of products including drilling rigs, top drives, mud pumps, and other drilling machinery. With a history dating back to 1934, Marathon Letourneau has established itself as a leading provider of drilling solutions worldwide.

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

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USPTO Data Jan 1 1976 - Dec 16 2025

9 Patents

#9 in Longview, TX

#2,006 in Texas

#31,616 in US

Longview, TX, United States of America

Marathon Letourneau Company

Forward Citations = 182

17 inventors:

Dwight Baker (3 out of 5 patents)

Ronald A Johnston (2 out of 22 patents)

Erwin F Stoldt (2 out of 2 patents)

4. Gary L Nelson (2 out of 2 patents)

5. Donald W Schaper (2 out of 2 patents)

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