For the Inventor, By the Inventor

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Houston, TX, United States of America

Hutchinson-hayes International

USPTO Granted Patents = 2

Forward Citations = 78

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4 inventors (with patents filed for the assignee):

Gary Lynn Hensley (2 out of 19 patents)

Adrianus Groeneweg (1 out of 2 patents)

Jan Van Dokkum (1 out of 1 patent)

4. Gerritt Stolk (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 5403260 - Automatic frequency controlled motor backdrive (1995-04-04),

2. 4557142 - Apparatus and method for real-time measurement of drilling fluid (1985-12-10),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#1,504 in Houston, TX

#6,126 in Texas

#92,554 in US

Houston, TX, United States of America

Hutchinson-hayes International

Forward Citations = 78

4 inventors:

Gary Lynn Hensley (2 out of 19 patents)

Adrianus Groeneweg (1 out of 2 patents)

Jan Van Dokkum (1 out of 1 patent)

4. Gerritt Stolk (1 out of 1 patent)

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