Patent Explorer
Browse, filter, and analyze 44 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| GB501121A | Improvements in piezo-electric crystals | Telefunken AG | Expired / Lapsed | 1938-09-07 | — | 1958-09-07 | 0.0 yrs | 0 | |
| US3144017A | Pill-type swallowable transmitter | Telefunken AG | Expired / Lapsed | 1961-01-03 | 1964-08-11 | 1981-01-03 | 0.0 yrs | 2 | |
| US2992144A | Method of forming transistors | Telefunken AG | Expired / Lapsed | 1959-05-29 | 1961-07-11 | 1979-05-29 | 0.0 yrs | 2 | |
| DE970248C | Arrangement for the use of a telemeter in the form of a magnetic bridge | Telefunken AG | Expired / Lapsed | 1952-11-27 | 1958-08-28 | 1972-11-27 | 0.0 yrs | 0 | |
| DE734905C | Circuit arrangement for the generation of saw-tooth-shaped and symmetrical voltages with respect to the zero line | Telefunken AG | Expired / Lapsed | 1936-03-13 | 1943-04-30 | 1956-03-13 | 0.0 yrs | 0 | |
| US2285857A | Receiver | Telefunken AG | Expired / Lapsed | 1937-11-11 | 1942-06-09 | 1957-11-11 | 0.0 yrs | 0 | |
| US2270922A | Piezoelectric crystal holder | Telefunken AG | Expired / Lapsed | 1939-10-17 | 1942-01-27 | 1959-10-17 | 0.0 yrs | 0 | |
| US2265784A | Method of producing electrical oscillations | Telefunken AG | Expired / Lapsed | 1939-08-31 | 1941-12-09 | 1959-08-31 | 0.0 yrs | 0 | |
| US2258836A | Cathode heater | Telefunken AG | Expired / Lapsed | 1940-06-19 | 1941-10-14 | 1960-06-19 | 0.0 yrs | 0 | |
| US2249933A | Piezoelectric plate | Telefunken AG | Expired / Lapsed | 1939-09-26 | 1941-07-22 | 1959-09-26 | 0.0 yrs | 0 | |
| US2243234A | Wave indication | Telefunken AG | Expired / Lapsed | 1940-01-18 | 1941-05-27 | 1960-01-18 | 0.0 yrs | 0 | |
| US2223995A | Impulse reception | Telefunken AG | Expired / Lapsed | 1938-04-20 | 1940-12-03 | 1958-04-20 | 0.0 yrs | 0 | |
| US2212128A | Antenna | Telefunken AG | Expired / Lapsed | 1939-05-06 | 1940-08-20 | 1959-05-06 | 0.0 yrs | 0 | |
| US2212110A | Radio beacon system | Telefunken AG | Expired / Lapsed | 1937-08-04 | 1940-08-20 | 1957-08-04 | 0.0 yrs | 0 | |
| US2202605A | Television system | Telefunken AG | Expired / Lapsed | 1937-08-07 | 1940-05-28 | 1957-08-07 | 0.0 yrs | 0 | |
| US2202380A | Confined or space resonance antenna | Telefunken AG | Expired / Lapsed | 1937-11-11 | 1940-05-28 | 1957-11-11 | 0.0 yrs | 0 | |
| US2202511A | Black spot compensation apparatus | Telefunken AG | Expired / Lapsed | 1937-04-28 | 1940-05-28 | 1957-04-28 | 0.0 yrs | 0 | |
| US2189584A | Transmitter | Telefunken AG | Expired / Lapsed | 1937-06-18 | 1940-02-06 | 1957-06-18 | 0.0 yrs | 0 | |
| US2187575A | Antenna winch for aircraft | Telefunken AG | Expired / Lapsed | 1938-06-25 | 1940-01-16 | 1958-06-25 | 0.0 yrs | 0 | |
| US2181309A | Electrical impulse segregation circuit | Telefunken AG | Expired / Lapsed | 1936-05-21 | 1939-11-28 | 1956-05-21 | 0.0 yrs | 0 |
Showing 1 to 20 of 44 patents
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