Duberg; John E.

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Newport News, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Reversible cycle heating and cooling system
- Patent number 4,493,193
- Issue date Jan 15, 1985
- Lake, Jr.; Rutherford C.
- Ralph H. Fisher
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Reversible cycle heating and cooling system
- Patent number 4,409,796
- Issue date Oct 18, 1983
- Lake, Jr.; Rutherford C.
- Ralph H. Fisher
- F24 - HEATING RANGES VENTILATING