Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7434544 | Water heater with dry tank or sediment detection feature | Donald E. Donnelly, Jeffrey N. Arensmeier | 2008-10-14 |
| 6555793 | Advanced radiant electric heater | Simon P. Griffiths | 2003-04-29 |
| 5981916 | Advanced cooking appliance | Simon P. Griffiths | 1999-11-09 |
| 5954981 | Mounting apparatus for modular radiant heating element | Subhash R. Deo | 1999-09-21 |
| 5880440 | Electrical coil insulator | Charles T. Whitfield, Ronald R. Barnes, T. Randall Markum | 1999-03-09 |