Robert A. Pennison
9Patents
8h-index
4Co-inventors
58Inventor score
Filing activity: Oct 31, 1983 → Feb 13, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5573074A | Gear shifting power tool | Mechanical Engineering; Lighting; Heating | 62 | Expired |
| US4799833A | Clutch for positive feed drill | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4592681A | Retraction apparatus for automatic feed drills or the like | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4681490A | Retraction apparatus for automatic feed drills or the like | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5588903A | Ergonomic power tool | Performing Operations; Transporting | 17 | Expired |
| US4702650A | Positive feed drill use counter | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5295770A | Air feed peck drill with pneumatic safety system | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4683682A | Safety lever for portable power tool | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5347764A | Handle arrangement for air power tool | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.