Ulrich Letsche
18Patents
10h-index
21Co-inventors
72Inventor score
Filing activity: Jul 12, 1982 → Oct 31, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4509488A | Process and apparatus for intermittent control of a cyclically operating internal combustion engine | Mechanical Engineering; Lighting; Heating | 203 | Expired |
| US4930464A | Hydraulically operating actuating device for a lift valve | Mechanical Engineering; Lighting; Heating | 54 | Expired |
| US5595148A | Hydraulic valve control device | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4546426A | Method for controlling the position of an actuator in a manner whereby the adjustment is adaptive | Physics | 25 | Expired |
| US5809950A | Hydraulic valve control arrangement | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4615321A | Method and apparatus for checking sensors | Physics | 21 | Expired |
| US5645030A | Motorbrake for a diesel engine | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5765515A | Controllable hydraulic valve operating mechanism | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4655254A | Control valve, in particular an electrohydraulic control valve | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6564758B1 | Method for operating an internal combustion engine with variable charge changing control times | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6167853A | Hydraulic control device for at least one lifting valve | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6491007B1 | Hydraulically controllable globe valve | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4903896A | Fuel injection device for an internal combustion engine having preinjection and main injection air compression and self-ignition | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6601552B2 | Hydraulically controllable globe valve | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4763841A | Injection nozzle for injecting fuel into the combustion chamber of an air-compressing fuel-injection engine | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5943988A | Operating arrangement for a gas change valve of an internal engine combustion engine | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4712530A | Hydraulic adjusting arrangement for an injection pump | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US4711220A | Pressure oil guide device for injection pump shaft | Mechanical Engineering; Lighting; Heating | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.