Joseph F. Grado

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Brooklyn, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Compressive pivot suspension system for an electromagnetic cartridge
- Patent number 4,174,111
- Issue date Nov 13, 1979
- Joseph F. Grado
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electromagnetic pickup with magnetic gap displacement generator
- Patent number 4,031,336
- Issue date Jun 21, 1977
- Joseph F. Grado
- H04 - ELECTRIC COMMUNICATION TECHNIQUE