| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Fluid heaters | |
| #2 | Domestic heating systems | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Torr Thomas W | 5 |
| #2 | Betts Everett D | 2 |
| #3 | Carter George B | 1 |
| #4 | Polad Thomas H | 1 |
| #5 | Kilgore Vaughn L | 1 |
| #6 | Freeland Fred B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2531344A | Air feeding and cooled furnace front structure | |
| US2560768A | Water heater | |
| US2468694A | Solid fuel burning water heater | |
| US2346876A | Heating furnace | |
| US2286519A | Heating system | |
| US2049731A | Humidifier | |
| US1958738A | Water heating coil | |
| US1965179A | Hot air furnace | |
| US1925122A | Air heater | |
| US1899486A | Gas furnace | |
| CA217192A | Hot air furnace |