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Arnold S. Heil
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Wausau, WI, US
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last 30 patents
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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
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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