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Automatic Control for Gas Water-Heaters.

Description: Patent for improvements to "a gas control for instantaneous gas water heaters" (lines 9-10), including illustrations and instructions.
Date: June 17, 1919
Creator: Hamilton, Paul H.

Automatic Gas Control for Gas Water-Heaters.

Description: Patent for an automatic control for instantaneous water heaters to control a supply of water and simultaneously an automatic supply of gas to the heater.
Date: October 7, 1919
Creator: Hamilton, Paul H.
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