David C. Dahl

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Merril, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Exhaust fan with dry lubricant coating
- Patent number 6,050,258
- Issue date Apr 18, 2000
- Greenheck Fan Corporation
- Emery W. Neitzel
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Exhaust fan with dry lubricant coating
- Patent number 5,809,993
- Issue date Sep 22, 1998
- Greenheck Fan Corporation
- Emery W. Neitzel
- F24 - HEATING RANGES VENTILATING