| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 59 | |
| #2 | Canada | 18 | |
| #3 | France | 5 | |
| #4 | Germany | 4 | |
| #5 | United Kingdom | 3 | |
| #6 | Austria | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Machines | |
| #3 | Thermal processes | |
| #4 | Measurement | |
| #5 | Chemical engineering | |
| #6 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Smith Harry F | 75 |
| #2 | Thomas Cureton | 2 |
| #3 | Smith Henry F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1925413A | Gas purification | |
| US1879563A | Heat engine | |
| US1794478A | Gas-generating apparatus | |
| US1664494A | Radio apparatus | |
| GB262781A | Improvements in or relating to gas generating apparatus | |
| US1829068A | Gas purification | |
| DE466830C | Recuperator with radiant or heat exchange bodies built in by way of the heating and heated means | |
| GB265358A | Improved method of and apparatus for transferring heat | |
| US1823382A | Gas generating apparatus | |
| US1697373A | Furnace | |
| US1923331A | Calorimeter and fluid regulating device | |
| US1761849A | Control mechanism | |
| US1639115A | Stove | |
| US1656837A | Circuit breaker | |
| US1781767A | Gas producer | |
| US1549158A | Purifier | |
| US1668987A | Fuel feeder | |
| US1588629A | Method of and apparatus for transferring heat | |
| US1675829A | Heat engine | |
| DE431268C | Gas generator with not lined shaft jacket |