Robert F. Phalen

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Chicago, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Tactile affirmative response membrane switch
- Patent number 4,684,767
- Issue date Aug 4, 1987
- Robert F. Phalen
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Membrane switch
- Patent number 4,602,135
- Issue date Jul 22, 1986
- Robert F. Phalen
- H01 - BASIC ELECTRIC ELEMENTS