ELAC Electroacustic GmbH
ELAC ElectActive Patents
0
Total Holdings
6
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| DE1036120B | Signaling device designed for use in water | Expired / Lapsed | 1954-12-03 | — | 0 | Details |
| US2757354A | Echo locating systems using sonic or supersonic pulses | Expired / Lapsed | 1950-07-19 | 1956-07-31 | 0 | Details |
| US2088324A | Magneto-strictive electromechanical sound device | Expired / Lapsed | 1935-05-22 | 1937-07-27 | 0 | Details |
| US1977974A | Apparatus for the directional transmission or reception of … | Expired / Lapsed | 1931-06-13 | 1934-10-23 | 0 | Details |
| US1893741A | Arrangement for directional transmission and reception with… | Expired / Lapsed | 1929-01-09 | 1933-01-10 | 0 | Details |
| FR664037A | Installation for acoustic signaling by high frequency oscil… | Expired / Lapsed | 1928-11-16 | 1929-08-28 | 0 | Details |