Steven L. Renfro

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Windsor Locks, CT, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for transfer of initiation signals
- Patent number 5,708,228
- Issue date Jan 13, 1998
- The Ensign-Bickford Company
- Daniel P. Sutula
- C06 - EXPLOSIVES MATCHES
Information Patent Grant
Liner and improved shaped charge especially for use in a well pipe...
- Patent number 5,509,356
- Issue date Apr 23, 1996
- The Ensign-Bickford Company
- Steven L. Renfro
- F42 - AMMUNITION BLASTING
Information Patent Grant
Well pipe perforating gun
- Patent number 5,477,785
- Issue date Dec 26, 1995
- The Ensign-Bickford Company
- Charles A. Dieman
- E21 - EARTH DRILLING MINING
Information Patent Grant
Explosive thrust-producing coupling
- Patent number 5,392,684
- Issue date Feb 28, 1995
- The Ensign-Bickford Company
- Steven L. Renfro
- F42 - AMMUNITION BLASTING
Information Patent Grant
Explosive release coupling
- Patent number 5,331,894
- Issue date Jul 26, 1994
- The Ensign-Bickford Company
- Steven G. Wassell
- F42 - AMMUNITION BLASTING