Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4257540 | Hand-held battery-powered grease gun | Norbert F. Cook | 1981-03-24 |
| 4240328 | Valve mechanism for a hydraulic expansible chamber motor | Jeffrey M. Kotyk | 1980-12-23 |
| D257213 | Battery powered grease gun | Norbert F. Cook | 1980-10-07 |
| 4186821 | Lubricating apparatus | — | 1980-02-05 |
| 4181066 | Expansible chamber motor | Clarence E. Kitchen | 1980-01-01 |