Donald W. Wilkening

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Akeley, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
High efficiency fireplace and method of operation
- Patent number 5,014,683
- Issue date May 14, 1991
- Donald W. Wilkening
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Air flow control for totally enclosed fireplace
- Patent number 4,706,647
- Issue date Nov 17, 1987
- Donald W. Wilkening
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Fireplace door
- Patent number 4,515,146
- Issue date May 7, 1985
- Donald W. Wilkening
- F24 - HEATING RANGES VENTILATING