| 2167940 | Heating and spraying apparatus | |||
| 2149667 | Fluid pressure generator | |||
| 2043002 | Apparatus for neutralizing noxious organisms | |||
| 1939783 | Self contained vapor engine | |||
| 1744598 | Process and apparatus for heating | |||
| 1639953 | Steam generator | |||
| 1580293 | Electrically-operated steam boiler | |||
| 1060718 | N/A |