Patent Explorer
Browse, filter, and analyze 183 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| GB460488A | Improvements in or relating to directional radio receivers | Telefunken AG | Expired / Lapsed | 1936-05-23 | — | 1956-05-23 | 0.0 yrs | 0 | |
| DE1014167B | Wing chair with built-in speakers | Telefunken AG | Expired / Lapsed | 1955-08-03 | — | 1975-08-03 | 0.0 yrs | 0 | |
| GB172321A | Improved calling apparatus for high frequency telegraphy | Telefunken AG | Expired / Lapsed | 1921-12-02 | — | 1941-12-02 | 0.0 yrs | 0 | |
| DE1100874B | Arrangement for performing stomach and intestinal examinations using a pill transmitter | Telefunken AG | Expired / Lapsed | 1960-01-16 | — | 1980-01-16 | 0.0 yrs | 0 | |
| GB501121A | Improvements in piezo-electric crystals | Telefunken AG | Expired / Lapsed | 1938-09-07 | — | 1958-09-07 | 0.0 yrs | 0 | |
| DE1054505B | Transistor circuit for generating approximately square-wave voltage oscillations, which are stepped up and rectified | Telefunken AG | Expired / Lapsed | 1957-02-23 | — | 1977-02-23 | 0.0 yrs | 0 | |
| GB480572A | Improvements in or relating to direction finding radio receivers | Telefunken AG | Expired / Lapsed | 1937-06-17 | — | 1957-06-17 | 0.0 yrs | 0 | |
| US3204198A | Circuit arrangement for changing the oscillator frequency of uhf tuners | Telefunken AG | Expired / Lapsed | 1960-12-05 | 1965-08-31 | 1980-12-05 | 0.0 yrs | 2 | |
| US3181150A | Indicating device | Telefunken AG | Expired / Lapsed | 1960-11-25 | 1965-04-27 | 1980-11-25 | 0.0 yrs | 2 | |
| US3144017A | Pill-type swallowable transmitter | Telefunken AG | Expired / Lapsed | 1961-01-03 | 1964-08-11 | 1981-01-03 | 0.0 yrs | 2 | |
| US3068473A | System for supervision of vehicles | Telefunken AG | Expired / Lapsed | 1959-11-03 | 1962-12-11 | 1979-11-03 | 0.0 yrs | 0 | |
| US3038028A | Arrangement for producing a series of pulses | Telefunken AG | Expired / Lapsed | 1958-02-07 | 1962-06-05 | 1978-02-07 | 0.0 yrs | 0 | |
| US2992144A | Method of forming transistors | Telefunken AG | Expired / Lapsed | 1959-05-29 | 1961-07-11 | 1979-05-29 | 0.0 yrs | 2 | |
| US2962666A | Oscillator synchronizing circuit with variable pull in range | Telefunken AG | Expired / Lapsed | 1959-10-06 | 1960-11-29 | 1979-10-06 | 0.0 yrs | 0 | |
| 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 | |
| DE864696C | Condenser microphone | Telefunken AG | Expired / Lapsed | 1942-04-01 | 1953-01-26 | 1962-04-01 | 0.0 yrs | 0 | |
| FR898352A | Improvements to simultaneous or alternative production systems for two directed radiations | Telefunken AG | Expired / Lapsed | 1943-09-29 | 1945-04-20 | 1963-09-29 | 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 | |
| US2292722A | Telemetric indicator of corrected angular positions | Telefunken AG | Expired / Lapsed | 1939-09-05 | 1942-08-11 | 1959-09-05 | 0.0 yrs | 0 | |
| US2292161A | Magnetic shielding | Telefunken AG | Expired / Lapsed | 1940-03-02 | 1942-08-04 | 1960-03-02 | 0.0 yrs | 0 |
Showing 1 to 20 of 183 patents
Page 1 of 10
Next →