Wilhelm Appel
9Patents
5h-index
9Co-inventors
56Inventor score
Filing activity: Jun 5, 1985 → Sep 26, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4756157A | Control device for a hydrostatic gear | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4756156A | Drive system with two hydrostatic gears | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US7388364B2 | Device for covering the peak load | Electricity | 7 | Active |
| US7120039B2 | Voltage converter | Electricity | 7 | Expired |
| US7927156B2 | Electrical connector element | Electricity | 5 | Active |
| US4722187A | Speed regulation device for a hydrostatic drive unit | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US8482941B2 | Method for operating a switched mode power supply with return of primary-side stray energy | Electricity | 0 | Active |
| US8331109B2 | Asymmetric half-bridge with reduced switch load | Electricity | 0 | Active |
| US8212434B2 | Method for operating switched-mode power supply units | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.