Walter E. Perkins Jr.

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Woodland Hills, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electron and ion beam-shaping apparatus
- Patent number 4,560,878
- Issue date Dec 24, 1985
- Hughes Aircraft Company
- Wolfgang Knauer
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Contrast enhancement of electron beam alignment marks
- Patent number 4,123,661
- Issue date Oct 31, 1978
- Hughes Aircraft Company
- Edward D. Wolf
- H01 - BASIC ELECTRIC ELEMENTS