J. Donaldson Thomas

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East Granby, CT, US

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Patents Grantslast 30 patents

Information Patent Grant
Low energy blasting initiation system, method and surface connectio...
- Patent number 5,398,611
- Issue date Mar 21, 1995
- The Ensign-Bickford Company
- Richard J. Michna
- C06 - EXPLOSIVES MATCHES
Information Patent Grant
Detonating cord and blasting cap connector block having a resilient...
- Patent number 5,192,828
- Issue date Mar 9, 1993
- The Ensign-Bickford Company
- Dennis K. Austin
- F42 - AMMUNITION BLASTING
Information Patent Grant
Low-energy blasting initiation system method and surface connection...
- Patent number 5,171,935
- Issue date Dec 15, 1992
- The Ensign-Bickford Company
- Richard J. Michna
- C06 - EXPLOSIVES MATCHES