Marconis Wireless Telegraph Co Ltd
Marconis WActive Patents
0
Total Holdings
20
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| 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 |
| GB553176A | Improvements in graving or like tools having a vibrating he… | Expired / Lapsed | 1941-11-07 | — | 0 | Details |
| GB496217A | Improvements in or relating to direction finding radio rece… | Expired / Lapsed | 1937-05-25 | — | 0 | Details |
| GB469417A | Improvements in or relating to echo sounding apparatus | Expired / Lapsed | 1936-01-24 | — | 0 | Details |
| GB441274A | Improvements in or relating to light valves | 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 |
| 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 |
| 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 |
| US2804495A | Color television transmitting system | Expired / Lapsed | 1951-02-06 | 1957-08-27 | 0 | Details |
| US2719247A | Cathode ray tube flying spot scanners | Expired / Lapsed | 1952-03-13 | 1955-09-27 | 0 | Details |
| US2622199A | Radio aerial system | Expired / Lapsed | 1948-10-11 | 1952-12-16 | 0 | Details |