Elfi Elektrofilter AB
3Patents
0Active
3Granted
26Portfolio score
Filing activity: Dec 12, 1978 → Sep 30, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4259093A | Electrostatic precipitator for air cleaning | Emerging Cross-Sectional Technologies | 39 | Expired |
| US7132010B2 | Air filtering system | Performing Operations; Transporting | 30 | Expired |
| US4240811A | Fixing and connecting device for wires and plates in electrostatic filters | Performing Operations; Transporting | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.