Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5486748 | Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive | Charles E. Konrad | 1996-01-23 |
| 5403244 | Electric vehicle drive train with direct coupling transmission | Jerome Benedict Tankersley, Charles E. Konrad | 1995-04-04 |
| 5287051 | Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive | Charles E. Konrad | 1994-02-15 |
| 5227703 | Protection system for alternating current, battery powered electric traction motor vehicle | Charles E. Konrad | 1993-07-13 |