Hartmut Sandau
9Patents
5h-index
9Co-inventors
56Inventor score
Filing activity: Jun 16, 1975 → Feb 7, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4303197A | Control valve | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6220288A | Electrohydraulic control device | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4164242A | Valve for a pressure tank | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US4096787A | Cylinder-and-piston arrangement and method of manufacturing the same | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5799485A | Electrohydraulic control device for double-acting consumer | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| USRE38355E1 | Electrohydraulic control device for double-acting consumer | General | 2 | Expired |
| US5839345A | Hydraulic control in monoblock structure for lifting and lowering a load with at least two electromagnetically actuatable proportional distributing valve elements | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US5290007A | Control device for volume stream of hydraulic working medium | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US3985197A | Hydrostatic power steering system | Performing Operations; Transporting | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.