William O. Berryman

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Subterranean well tool with pressure equalizing release
- Patent number 4,460,041
- Issue date Jul 17, 1984
- Baker Oil Tools, Inc.
- William O. Berryman
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hydraulic fishing jar having tandem piston arrangement
- Patent number 4,059,167
- Issue date Nov 22, 1977
- Baker International Corporation
- William O. Berryman
- E21 - EARTH DRILLING MINING