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Joseph F. Donovan
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Tomball, TX, US
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last 30 patents
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Patent Grant
Boosterless perforating gun
Patent number
4,747,201
Issue date
May 31, 1988
Baker Oil Tools, Inc.
Joseph F. Donovan
F42 - AMMUNITION BLASTING
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Patent Grant
Boosterless perforating gun and method of assembly
Patent number
4,635,734
Issue date
Jan 13, 1987
Baker Oil Tools, Inc.
Joseph F. Donovan
F42 - AMMUNITION BLASTING
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Patent Grant
One trip multi-zone gravel packing apparatus
Patent number
4,401,158
Issue date
Aug 30, 1983
Baker International Corporation
Jack D. Spencer
E21 - EARTH DRILLING MINING