Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6561183 | Fluid heater system with tiltable heater assembly | Andrew F. Johnke | 2003-05-13 |
| 6435174 | Fluid heater coil configuration and fabrication method | John W. Finger, Andrew F. Johnke | 2002-08-20 |
| 6092768 | Rectangular support frame for supporting and transporting components of a cleaning device | Arden L. Larson, John W. Finger | 2000-07-25 |