Howard R. Mashaw Jr.

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The Colony, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Variable flow sliding sleeve valve and positioning shifting tool th...
- Patent number 5,211,241
- Issue date May 18, 1993
- Otis Engineering Corporation
- Howard R. Mashaw
- E21 - EARTH DRILLING MINING
Information Patent Grant
Sleeve valve device and shifting tool therefor
- Patent number 5,183,114
- Issue date Feb 2, 1993
- Otis Engineering Corporation
- Howard R. Mashaw
- E21 - EARTH DRILLING MINING
Information Patent Grant
Well device lock mandrel and running tool
- Patent number 4,944,345
- Issue date Jul 31, 1990
- Otis Engineering Corporation
- Howard R. Mashaw
- E21 - EARTH DRILLING MINING
Information Patent Grant
Well flow device
- Patent number 4,915,175
- Issue date Apr 10, 1990
- Otis Engineering Corporation
- Howard R. Mashaw
- E21 - EARTH DRILLING MINING
Information Patent Grant
Piston-expanded metallic seal for side door well valve
- Patent number 4,448,427
- Issue date May 15, 1984
- Otis Engineering Corporation
- Howard R. Mashaw
- E21 - EARTH DRILLING MINING