Marconis Wireless Telegraph Co Ltd
Marconis WActive Patents
0
Total Holdings
54
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB790692A | Improvements in or relating to torque meters | Expired / Lapsed | 1955-05-12 | — | 0 | Details |
| GB743533A | Improvements in or relating to multiple beam aerial arrange… | Expired / Lapsed | 1953-03-06 | — | 0 | Details |
| GB703189A | Improvements in or relating to relative phase responsive ar… | Expired / Lapsed | 1951-07-10 | — | 0 | Details |
| GB641431A | Improvements in or relating to voice and like signal operat… | Expired / Lapsed | 1947-04-18 | — | 0 | Details |
| GB607315A | Television transmitting systems | Expired / Lapsed | 1945-12-21 | — | 0 | Details |
| GB594539A | Secret radio-communication system | Expired / Lapsed | 1944-09-26 | — | 0 | Details |
| GB561459A | Improvements in or relating to electric frequency changing … | Expired / Lapsed | 1942-05-18 | — | 0 | Details |
| GB553176A | Improvements in graving or like tools having a vibrating he… | Expired / Lapsed | 1941-11-07 | — | 0 | Details |
| GB543222A | Improvements in radio frequency phase shifting circuit arra… | Expired / Lapsed | 1940-08-08 | — | 0 | Details |
| GB540218A | Improvements in electronic relay circuit arrangements | Expired / Lapsed | 1940-04-03 | — | 0 | Details |
| GB538214A | Improvements in or relating to the successive indication of… | Expired / Lapsed | 1940-03-30 | — | 0 | Details |
| GB526988A | Improvements in or relating to printing telegraph receiving… | Expired / Lapsed | 1939-03-30 | — | 0 | Details |
| GB515199A | Improvements in or relating to echo sounding apparatus | Expired / Lapsed | 1938-03-04 | — | 0 | Details |
| GB513163A | Improvements in or relating to signal actuated alarm, call,… | Expired / Lapsed | 1938-03-04 | — | 0 | Details |
| GB496217A | Improvements in or relating to direction finding radio rece… | Expired / Lapsed | 1937-05-25 | — | 0 | Details |
| GB472214A | Improvements in or relating to modulated carrier wave syste… | Expired / Lapsed | 1937-01-06 | — | 0 | Details |
| GB456564A | Improvements in and relating to television systems | Expired / Lapsed | 1936-03-26 | — | 0 | Details |
| GB469417A | Improvements in or relating to echo sounding apparatus | Expired / Lapsed | 1936-01-24 | — | 0 | Details |
| GB444023A | Improvements in or relating to electrical resistances and m… | Expired / Lapsed | 1934-09-10 | — | 0 | Details |
| GB441274A | Improvements in or relating to light valves | Expired / Lapsed | 1934-07-13 | — | 0 | Details |
| GB441479A | Improvements in or relating to automatic control apparatus … | Expired / Lapsed | 1934-07-13 | — | 0 | Details |
| GB402121A | Improvements in or relating to television systems | Expired / Lapsed | 1932-05-25 | — | 0 | Details |
| GB372654A | Improvements in or relating to electrical control systems, … | Expired / Lapsed | 1931-09-01 | — | 0 | Details |
| GB371476A | Improvements in or relating to directional aerials and appa… | Expired / Lapsed | 1931-01-28 | — | 0 | Details |
| GB368286A | Improvements in or relating to radio high frequency receive… | Expired / Lapsed | 1930-12-02 | — | 0 | Details |
| GB365551A | Improvements in or relating to electrical coils | Expired / Lapsed | 1930-10-20 | — | 0 | Details |
| GB342219A | Improvements in or relating to light valves | Expired / Lapsed | 1930-04-25 | — | 0 | Details |
| GB283596A | Improvements in or relating to piezo electric devices | Expired / Lapsed | 1928-01-14 | — | 0 | Details |
| US3031664A | Polarisation screen and filter for radio waves | Expired / Lapsed | 1959-11-12 | 1962-04-24 | 0 | Details |
| US3028508A | Saw tooth wave generators | Expired / Lapsed | 1958-03-10 | 1962-04-03 | 0 | Details |
| US3015098A | Radio position indicating systems | Expired / Lapsed | 1958-12-08 | 1961-12-26 | 0 | Details |
| US3011127A | Variable radix binary divider | Expired / Lapsed | 1959-03-06 | 1961-11-28 | 0 | Details |
| US3011119A | Sine-cosine synchro resolver circuit arrangements | Expired / Lapsed | 1958-12-29 | 1961-11-28 | 0 | Details |
| US3001188A | Anti-collision radio equipment for aircraft use | Expired / Lapsed | 1958-10-23 | 1961-09-19 | 0 | Details |
| US2959777A | Radar display system | Expired / Lapsed | 1955-02-28 | 1960-11-08 | 0 | Details |
| US2932793A | Automatic frequency controlling systems | Expired / Lapsed | 1957-09-17 | 1960-04-12 | 0 | Details |
| US2932823A | Selective directional slotted wave guide antenna | Expired / Lapsed | 1957-08-19 | 1960-04-12 | 0 | Details |
| US2903692A | Radio distance measuring systems | Expired / Lapsed | 1956-07-09 | 1959-09-08 | 0 | Details |
| US2897442A | Frequency spectrum analyzers | Expired / Lapsed | 1953-10-13 | 1959-07-28 | 0 | Details |
| US2892883A | Color television | Expired / Lapsed | 1954-10-18 | 1959-06-30 | 0 | Details |
| US2877416A | Phase measuring circuit arrangements | Expired / Lapsed | 1954-03-01 | 1959-03-10 | 0 | Details |
| US2831974A | Automatic frequency control systems | Expired / Lapsed | 1954-09-10 | 1958-04-22 | 0 | Details |
| US2813974A | Narrow band selective circuit arrangements | Expired / Lapsed | 1956-11-07 | 1957-11-19 | 0 | Details |
| US2804495A | Color television transmitting system | Expired / Lapsed | 1951-02-06 | 1957-08-27 | 0 | Details |
| US2738424A | Pulse controlled oscillator arrangements | Expired / Lapsed | 1953-07-20 | 1956-03-13 | 0 | Details |
| US2719247A | Cathode ray tube flying spot scanners | Expired / Lapsed | 1952-03-13 | 1955-09-27 | 0 | Details |
| US2715660A | Time constant control circuits for radio telephone and simi… | Expired / Lapsed | 1950-02-13 | 1955-08-16 | 0 | Details |
| FR1098286A | Multi-beam aerial systems enhancements | Expired / Lapsed | 1954-03-06 | 1955-07-21 | 0 | Details |
| US2693500A | Television and like transmitter | Expired / Lapsed | 1949-08-01 | 1954-11-02 | 0 | Details |
| US2670409A | Thermionic amplifier | Expired / Lapsed | 1951-01-29 | 1954-02-23 | 0 | Details |
| US2622199A | Radio aerial system | Expired / Lapsed | 1948-10-11 | 1952-12-16 | 0 | Details |
| US1925608A | Apparatus for recording and/or reproducing sound | Expired / Lapsed | 1929-08-26 | 1933-09-05 | 0 | Details |
| US1121986A | Subaqueous audible signaling apparatus. | Expired / Lapsed | 1914-04-13 | 1914-12-22 | 0 | Details |
| US676332A | Apparatus for wireless telegraphy. | Expired / Lapsed | 1901-02-23 | 1901-06-11 | 0 | Details |