Harold W. Hansen

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Wilsonville, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Firehouse exhaust recovery system
- Patent number 5,630,751
- Issue date May 20, 1997
- Energy Savings Products, Inc.
- Harold W. Hansen
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Space heating element and shaped insulated mounting therefor
- Patent number 4,770,233
- Issue date Sep 13, 1988
- Harold W. Hansen
- F24 - HEATING RANGES VENTILATING