Frederic W. Pollman
38Patents
13h-index
16Co-inventors
78Inventor score
Filing activity: May 5, 1977 → Mar 6, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4399886A | Controls for variable displacement motor and motors | Mechanical Engineering; Lighting; Heating | 73 | Expired |
| US4478041A | Hydraulic motor control | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US4401182A | Variable displacement hydraulic drive with disconnect | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US4476680A | Pressure override control | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4341131A | Hydromechanical transmissions | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4306467A | Hydromechanical transmissions | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US6988959B2 | Golf putter | Human Necessities | 24 | Expired |
| US4537364A | Constant tension cable reel drive | Electricity | 23 | Expired |
| US5560203A | Transmission control system and method | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US7354368B2 | Method and means for shifting a hydromechanical transmission | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US6533695B2 | Hydromechanical transmission | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4232572A | Engine-transmission control system | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4102131A | Integrated transmission-engine control | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4111003A | Hydraulic transmission drive assembly with noise attenuation means | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4246806A | Multi-mode hydromechanical transmission shift system | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4426194A | Viscosity compensating circuits | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6575872B2 | Method and apparatus for making smooth shifts during mode changes of an HMT when using mechanical clutches | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US4419610A | Reversible regenerating electric vehicle drive | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6626785B2 | Hydromechanical transmission | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6932733B2 | Hydromechanical transmission with differential steer | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US6860358B1 | Utility vehicle having hydrostatic drive | Performing Operations; Transporting | 8 | Expired |
| US7175537B2 | Golf putter with lift angle | Human Necessities | 8 | Expired |
| US6338689B1 | Hydromechanical transmission | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4352367A | Electro-hydraulic control structure | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4462210A | Input torque control for a variable displacement hydraulic transmission | Mechanical Engineering; Lighting; Heating | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.