| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Thermal processes | |
| #3 | Control | |
| #4 | Mechanical elements | |
| #5 | Engines, pumps and turbines | |
| #6 | Electrical machinery and energy |
| # | Name | Total Patents |
|---|---|---|
| #1 | William Eichholz | 6 |
| #2 | Leutwiler Richard W | 6 |
| #3 | Hornung John C | 3 |
| #4 | Whittington William P | 2 |
| #5 | Wright Douglas B | 2 |
| #6 | Mckee John F | 2 |
| #7 | Ehretsman John L | 1 |
| #8 | Paul Hultgren | 1 |
| #9 | Eichholz William | 1 |
| #10 | Macdonald John E | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2370296A | Steam trap valve mechanism | |
| US2239444A | Humidifying apparatus | |
| US2193160A | Heating system | |
| US2137804A | Nipple orifice | |
| US2209566A | Regulating apparatus | |
| US2162779A | Pressure regulator | |
| US2108601A | Steam heating | |
| US2134257A | Pressure regulator | |
| US2103113A | Regulating apparatus | |
| US2095506A | Air-venting valve for steam appliances | |
| US1921312A | Thermostat | |
| US1777817A | Vacuum pump | |
| US1777816A | Vacuum system | |
| US1610871A | Trap | |
| US1522619A | Heating system | |
| US1326944A | Heating system | |
| US1025293A | Steam-trap. | |
| US847934A | Heating system. | |
| CA342271A | Thermostat | |
| CA256157A | Trap |