Donald E. Trott

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Victoria, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Automatic closing gate
- Patent number 6,408,571
- Issue date Jun 25, 2002
- Donald E. Trott
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Casing perforation method and apparatus
- Patent number 4,375,834
- Issue date Mar 8, 1983
- D & D Company Ltd.
- Donald E. Trott
- E21 - EARTH DRILLING MINING
Information Patent Grant
Automatic coupling and decoupling apparatus
- Patent number 4,199,210
- Issue date Apr 22, 1980
- Donald E. Trott
- E21 - EARTH DRILLING MINING
Information Patent Grant
Casing perforation method and apparatus
- Patent number 4,113,016
- Issue date Sep 12, 1978
- Donald E. Trott
- E21 - EARTH DRILLING MINING