John S. Roberts

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Patents Grantslast 30 patents

Information Patent Grant
Low forward voltage drop thyristor
- Patent number 4,043,837
- Issue date Aug 23, 1977
- Westinghouse Electric Corporation
- Michael W. Cresswell
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of making a light activated semiconductor controlled rectifier
- Patent number 3,991,460
- Issue date Nov 16, 1976
- Westinghouse Electric Corporation
- John S. Roberts
- G02 - OPTICS
Information Patent Grant
Low forward voltage drop thyristor
- Patent number 3,990,091
- Issue date Nov 2, 1976
- Westinghouse Electric Corporation
- Michael W. Cresswell
- H01 - BASIC ELECTRIC ELEMENTS