James L. Franklin

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Richland, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Direct expansion solar collector-heat pump system
- Patent number 4,798,056
- Issue date Jan 17, 1989
- Sigma Research, Inc.
- James L. Franklin
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Direct expansion solar collector-heat pump system
- Patent number 4,392,359
- Issue date Jul 12, 1983
- Sigma Research, Inc.
- James L. Franklin
- F24 - HEATING RANGES VENTILATING