Vickers Systems
21Patents
0Active
21Granted
32Portfolio score
Filing activity: May 11, 1984 → Jul 9, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5079498A | Digital pulse-width-modulation generator for current control | Electricity | 71 | Expired |
| US5285379A | Sliding mode control system | Physics | 19 | Expired |
| US5276387A | Sliding mode control system | Physics | 19 | Expired |
| US4770612A | Steering power-assistance arrangement | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5064351A | Variable displacement pumps | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4621982A | Double pump | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4862920A | Spool for a spool valve and method of producing same | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5074134A | Lockable adjustment mechanism | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4681517A | Hydraulic pump | Performing Operations; Transporting | 11 | Expired |
| US4830592A | Rotary gear pump or motor for fluids | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US4838298A | Hydraulic latch device | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5320499A | Open-loop hydraulic supply system | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5079994A | Radial piston machine | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4637782A | Rotary vane pump | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4719944A | Pilot valves for two-stage hydraulic devices | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6006783A | Magnetically actuatable valve | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4575314A | Deflecting insert for a rotary vane pump | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US4811607A | Flow sensor | Physics | 4 | Expired |
| US4785839A | Pilot valves for two-stage hydraulic devices | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6604269B2 | Machine tool | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4610607A | Steering assistance pump | Mechanical Engineering; Lighting; Heating | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.