Frederic D. Sewell

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Dallas, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Liquid spray air purification and controlled humidification apparat...
- Patent number 5,531,801
- Issue date Jul 2, 1996
- Frederic D. Sewell
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Liquid spray air purification and controlled humidification apparatus
- Patent number 5,531,800
- Issue date Jul 2, 1996
- Frederic D. Sewell
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Heating, ventilation and air conditioning unit with automatically c...
- Patent number 5,389,120
- Issue date Feb 14, 1995
- Frederic D. Sewell
- F24 - HEATING RANGES VENTILATING