Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7708052 | Coil support | Derek Leman, Christopher J. Ingermann, Loren D. Hoffman, Frank J. David, John A. Wade +2 more | 2010-05-04 |
| D538724 | Tri-spoke motor cap | Derek Leman, Frank J. David | 2007-03-20 |
| 4206930 | Circumferentially compressed piston ring assembly and method | Gordon E. Thrane | 1980-06-10 |