Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6254353 | Method and apparatus for controlling operation of a submersible pump | Massimo Polo, Stefano Cavagna, Charles E. Konrad | 2001-07-03 |
| 5945802 | Ground fault detection and protection method for a variable speed ac electric motor | Charles E. Konrad, Massimo Polo | 1999-08-31 |