Patent Explorer
Browse, filter, and analyze 6 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| DE1036120B | Signaling device designed for use in water | ELAC Electroacustic GmbH | Expired / Lapsed | 1954-12-03 | — | 1974-12-03 | 0.0 yrs | 0 | |
| US2757354A | Echo locating systems using sonic or supersonic pulses | ELAC Electroacustic GmbH | Expired / Lapsed | 1950-07-19 | 1956-07-31 | 1970-07-19 | 0.0 yrs | 0 | |
| US2088324A | Magneto-strictive electromechanical sound device | ELAC Electroacustic GmbH | Expired / Lapsed | 1935-05-22 | 1937-07-27 | 1955-05-22 | 0.0 yrs | 0 | |
| US1977974A | Apparatus for the directional transmission or reception of wave energy | ELAC Electroacustic GmbH | Expired / Lapsed | 1931-06-13 | 1934-10-23 | 1951-06-13 | 0.0 yrs | 0 | |
| US1893741A | Arrangement for directional transmission and reception with a plurality of oscillators | ELAC Electroacustic GmbH | Expired / Lapsed | 1929-01-09 | 1933-01-10 | 1949-01-09 | 0.0 yrs | 0 | |
| FR664037A | Installation for acoustic signaling by high frequency oscillations | ELAC Electroacustic GmbH | Expired / Lapsed | 1928-11-16 | 1929-08-28 | 1948-11-16 | 0.0 yrs | 0 |