August H. Hummert III

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St. Louis, MO, US

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Patents Grantslast 30 patents

Information Patent Grant
Flexible duct with method of making same
- Patent number 5,285,818
- Issue date Feb 15, 1994
- August H. Hummert
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Flexible duct and method of suspending a duct
- Patent number 5,137,057
- Issue date Aug 11, 1992
- August H. Hummert
- F24 - HEATING RANGES VENTILATING