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Electrical & Energy
Class Information
Number:
236/26D
Name:
Automatic temperature and humidity regulation
>
Closed fluid heaters
>
Pressure-operated
> Pressure responsive means controls forced draft
Description:
Patents under this class:
Patent Number
Title Of Patent
Date Issued
5197665
Water heater
Mar. 30, 1993
4677357
Furnace draft control with remote control feature
Jun. 30, 1987
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