UNT Libraries Government Documents Department - 2 Matching Results
Search Results
- Automatic Control for Gas Water-Heaters.
- Patent for improvements to "a gas control for instantaneous gas water heaters" (lines 9-10), including illustrations and instructions.
- Automatic Gas Control for Gas Water-Heaters.
- 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.