For the Inventor, By the Inventor

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Houston, TX, United States of America

Stewart & Stevenson Oiltools, Inc.

USPTO Granted Patents = 2

Forward Citations = 62

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6 inventors (with patents filed for the assignee):

David P Herd (1 out of 11 patents)

Jack Whiteman (1 out of 3 patents)

Terry W Pollard (1 out of 1 patent)

4. Bill M Brock, Jr (1 out of 2 patents)

5. Leo Jude Marquette (1 out of 1 patent)

6. Norman A Nelson (1 out of 9 patents)

2 patents: Sort by Forward Citations

1. 3993100 - Hydraulic control system for controlling a plurality of underwater (1976-11-23),

2. 3974690 - Method of and apparatus for measuring annulus pressure in a well (1976-08-17),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#1,504 in Houston, TX

#6,126 in Texas

#92,555 in US

Houston, TX, United States of America

Stewart & Stevenson Oiltools, Inc.

Forward Citations = 62

6 inventors:

David P Herd (1 out of 11 patents)

Jack Whiteman (1 out of 3 patents)

Terry W Pollard (1 out of 1 patent)

4. Bill M Brock, Jr (1 out of 2 patents)

5. Leo Jude Marquette (1 out of 1 patent)

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