Donald L. Townsend

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Maricopa County, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Constant humidity evaporative wicking filter humidifier
- Patent number 5,061,405
- Issue date Oct 29, 1991
- Emerson Electric Co.
- Terrence L. Stanek
- F24 - HEATING RANGES VENTILATING