| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Mechanical elements | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Steam generation | |
| #2 | Unspecified technologies | |
| #3 | Supplying combustion engines | |
| #4 | Internal-combustion piston engines | |
| #5 | Burners | |
| #6 | Controlling combustion | |
| #7 | Vehicle wheels | |
| #8 | Preheating for stem generation | |
| #9 | Servomotors |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ofeldt Ernest G | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US1966356A | Pump | |
| US1936853A | Pump | |
| US1432488A | Steam-boiler structure | |
| CA188672A | Water regulator | |
| US1288149A | Automatic low-water fuel shut-off. | |
| US1197054A | Gas-regulator. | |
| US904984A | Automatic fuel-feed. | |
| US829996A | Spring-tire. | |
| US819078A | Feed-water regulator. | |
| US724491A | Liquid-fuel burner. | |
| US716467A | Boiler. |