John F. Perkins

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Vacuum detector
- Patent number 4,471,309
- Issue date Sep 11, 1984
- Westinghouse Electric Corp.
- William J. Lange
- G01 - MEASURING TESTING
Information Patent Grant
Vacuum circuit interrupter with insulated vacuum monitor resistor
- Patent number 4,403,124
- Issue date Sep 6, 1983
- Westinghouse Electric Corp.
- John F. Perkins
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Dual-compression gas-blast puffer-type interrupting device
- Patent number 4,163,131
- Issue date Jul 31, 1979
- Westinghouse Electric Corp.
- John F. Perkins
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Dual compression puffer interrupter
- Patent number 3,991,292
- Issue date Nov 9, 1976
- Westinghouse Electric Corporation
- John F. Perkins
- H01 - BASIC ELECTRIC ELEMENTS