| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 7 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Machines | |
| #3 | Control |
| # | Technology | |
|---|---|---|
| #1 | Fluid heaters | |
| #2 | Unspecified technologies | |
| #3 | Ignition and extinguishing | |
| #4 | Burners | |
| #5 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Shuell Frank W | 14 |
| #2 | Ledbetter Elmer E | 8 |
| #3 | Tobey Thomas J | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US1699297A | Device for controlling fuel supply to gas-burner pilots | |
| US1705787A | Thermostatic gas regulator | |
| US1636016A | Draft hood for hot-water heaters | |
| US1734920A | Hot-water system | |
| US1699032A | Gas burner | |
| US1594074A | Internal-combustion-radiator-unit heating system and method of operating same | |
| US1634889A | Water heater | |
| US1637395A | Water-heating apparatus | |
| CA256349A | Thermostatically controlled gas burner | |
| CA300387A | Thermostatic gas regulator | |
| CA274231A | Water heating apparatus | |
| CA269232A | Gas valve | |
| CA273328A | Heating system | |
| CA325735A | Hot water system | |
| CA305185A | Gas burner |