Robert G. Frey

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Strongsville, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
High pressure sodium vapor lamp having resistance heater means
- Patent number 4,459,513
- Issue date Jul 10, 1984
- General Electric Company
- Robert G. Frey
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
High pressure sodium vapor lamp having resistance heater means
- Patent number 4,442,378
- Issue date Apr 10, 1984
- General Electric Company
- Robert G. Frey
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
High pressure sodium vapor lamp having resistance heater means
- Patent number 4,442,379
- Issue date Apr 10, 1984
- General Electric Company
- Robert G. Frey
- H01 - BASIC ELECTRIC ELEMENTS