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For the Inventor, By the Inventor

Addison, TX, United States of America

American Coldset Corporation


USPTO Granted Patents = 3

Forward Citations = 90

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3 inventors (with patents filed for the assignee):

goldMedal Charles M Thompson (3 out of 3 patents)

silverMedal Charles T Thompson (3 out of 3 patents)

bronzeMedal Charles W Spehrley (1 out of 6 patents)


3 patents:

1. 4275935 - Drilling stabilizer (1981-06-30),
2. 4258803 - Core barrel for obtaining and retrieving subterranean formation samples (1981-03-31),
3. 4142594 - Method and core barrel apparatus for obtaining and retrieving (1979-03-06),
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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#35 in Addison, TX

#4,680 in Texas

#72,004 in US

...
Addison, TX, United States of America

American Coldset Corporation

Forward Citations = 90

3 inventors:

goldMedal Charles M Thompson (3 out of 3 patents)

silverMedal Charles T Thompson (3 out of 3 patents)

bronzeMedal Charles W Spehrley (1 out of 6 patents)

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