Donald L. Spencer

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Iowa City, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for collecting solar energy
- Patent number 4,299,200
- Issue date Nov 10, 1981
- University of Iowa Research Foundation
- Donald L. Spencer
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Apparatus for containing liquid
- Patent number 4,286,577
- Issue date Sep 1, 1981
- The University of Iowa Research Foundation
- Donald L. Spencer
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Solar absorber panel, collector assembly and installation method
- Patent number 4,240,407
- Issue date Dec 23, 1980
- University of Iowa Research Foundation
- Donald L. Spencer
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Apparatus and method for collecting solar energy
- Patent number 4,186,726
- Issue date Feb 5, 1980
- The University of Iowa Research Foundation
- Donald L. Spencer
- F24 - HEATING RANGES VENTILATING