ER Fluid Developments Limited
5Patents
0Active
5Granted
24Portfolio score
Filing activity: Sep 11, 1985 → Dec 17, 1998
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4812251A | Electro-rheological fluids/electric field responsive fluids | Chemistry; Metallurgy | 17 | Expired |
| US4664236A | Electrically controlled, progressive, frictional, torque transmitting device | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5409354A | Variable displacement pump | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5356269A | Variable displacement pump | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6272852A | High speed actuators and vibrators based on electro-rheological fluids | Mechanical Engineering; Lighting; Heating | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.