Walter Kropp
16Patents
8h-index
4Co-inventors
61Inventor score
Filing activity: Apr 20, 1981 → Mar 10, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4617854A | Multiple consumer hydraulic mechanisms | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US4635440A | Dual consumer hydraulic mechanisms | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5211014A | Hydraulic drive system | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4617798A | Hydrostatic drive systems | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4738279A | Multiway valves with load feedback | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5460000A | Hydrostatic drive system | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5931078A | Hydrostatic drive system | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US4738102A | Hydrostatic drives | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5562019A | Hydrostatic drive system | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4388946A | Valves | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4719753A | Slide valve for load sensing control in a hydraulic system | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5237908A | Control system for the load-independent distribution of a pressure medium | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US4733533A | Controls for power drive assemblies | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US4742676A | Reversible hydrostatic transmission pump with drive engine speed control | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US4413650A | Hydraulic spool valves with controlled by-pass | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6148856A | Control valve | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.