Robert S. Higgins

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Tulsa, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Side pocket mandrel and method of construction
- Patent number RE32441
- Issue date Jun 23, 1987
- Otis Engineering Corporation
- Robert S. Higgins
- 166 - Wells
Information Patent Grant
Automatic reset pneumatic timer
- Patent number 4,354,524
- Issue date Oct 19, 1982
- Otis Engineering Corporation
- Robert S. Higgins
- E21 - EARTH DRILLING MINING
Information Patent Grant
Electronic intermitter
- Patent number 4,355,365
- Issue date Oct 19, 1982
- Otis Engineering Corporation
- Oliver W. McCracken
- E21 - EARTH DRILLING MINING
Information Patent Grant
Side pocket mandrel and method of construction
- Patent number 4,333,527
- Issue date Jun 8, 1982
- Otis Engineering Corporation
- Robert S. Higgins
- E21 - EARTH DRILLING MINING