Walter M. Shaffer
11Patents
6h-index
4Co-inventors
48Inventor score
Filing activity: Nov 18, 1974 → Oct 10, 1978
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4057019A | Self-contained steering guidance means | Performing Operations; Transporting | 39 | Expired |
| US4132132A | Power train with an auxiliary creeper drive system | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4271723A | Power train with an auxiliary creeper drive system | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4024968A | Heavy lift side loader truck | Performing Operations; Transporting | 10 | Expired |
| US4100739A | Pressure sensitive charging means for a steering system | Emerging Cross-Sectional Technologies | 9 | Expired |
| US3976158A | Power steering system for electric-drive lift truck | Performing Operations; Transporting | 8 | Expired |
| US4056989A | Vehicle drive | Emerging Cross-Sectional Technologies | 6 | Expired |
| US3977550A | Side handling attachment | Performing Operations; Transporting | 4 | Expired |
| US4189276A | Side loading ultra-narrow aisle lift truck | Performing Operations; Transporting | 4 | Expired |
| US4034881A | Outrigger and frame support member | Performing Operations; Transporting | 2 | Expired |
| US4099378A | Blocking valve for power steering for lift trucks | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.