British Thomson Houston Co Ltd
British ThActive Patents
0
Total Holdings
54
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB832378A | Improvements in and relating to projector lanterns | Expired / Lapsed | 1957-03-28 | — | 0 | Details |
| GB764588A | Improvements in and relating to automatic positioning appar… | Expired / Lapsed | 1953-07-13 | — | 0 | Details |
| GB724555A | Improvements in and relating to continuous wave radar syste… | Expired / Lapsed | 1953-02-19 | — | 0 | Details |
| GB688260A | Improvements in and relating to electric cord fasteners | Expired / Lapsed | 1951-11-29 | — | 0 | Details |
| GB680098A | Improvements in and relating to electric transformers | Expired / Lapsed | 1951-07-05 | — | 0 | Details |
| GB699256A | Improvements in and relating to eddy-current brakes with ma… | Expired / Lapsed | 1951-01-31 | — | 0 | Details |
| GB658495A | Improvements in and relating to thermal responsive resistan… | Expired / Lapsed | 1949-11-29 | — | 0 | Details |
| GB666786A | Improvements in and relating to thickness gauges | Expired / Lapsed | 1949-06-14 | — | 0 | Details |
| GB629215A | Improvements relating to point contact rectifiers | Expired / Lapsed | 1947-10-31 | — | 0 | Details |
| GB615110A | Improvements in and relating to cleaning and electro-platin… | Expired / Lapsed | 1946-07-24 | — | 0 | Details |
| GB637785A | Improvements in and relating to screwdown control systems f… | Expired / Lapsed | 1946-04-24 | — | 0 | Details |
| GB620140A | Improvements relating to d.c. amplifiers | Expired / Lapsed | 1946-03-20 | — | 0 | Details |
| GB635684A | Improvements in and relating to dynamo electric machines | Expired / Lapsed | 1946-03-11 | — | 0 | Details |
| GB590886A | Improvements in frequency responsive means particularly for… | Expired / Lapsed | 1944-02-22 | — | 0 | Details |
| GB548346A | Improvements in high frequency electron discharge apparatus | Expired / Lapsed | 1941-03-03 | — | 0 | Details |
| GB544694A | Improvements in photographic objectives | Expired / Lapsed | 1941-01-28 | — | 0 | Details |
| GB539093A | Improvements in and relating to cores for electrical appara… | Expired / Lapsed | 1940-06-21 | — | 0 | Details |
| GB526924A | Improvements in and relating to electric lamps | Expired / Lapsed | 1939-03-29 | — | 0 | Details |
| GB508657A | Improvements in and relating to methods of supporting piezo… | Expired / Lapsed | 1938-12-20 | — | 0 | Details |
| GB521099A | Improvements in and relating to luminescent powders, and me… | Expired / Lapsed | 1938-11-07 | — | 0 | Details |
| GB500344A | Improvements in and relating to dry surface-contact electri… | Expired / Lapsed | 1938-09-21 | — | 0 | Details |
| GB500180A | Improvements in and relating to dry surface contact electri… | Expired / Lapsed | 1938-09-21 | — | 0 | Details |
| GB500342A | Improvements relating to dry surface-contact electric recti… | Expired / Lapsed | 1938-09-19 | — | 0 | Details |
| GB511175A | Improvements in automatic calculating apparatus | Expired / Lapsed | 1937-11-11 | — | 0 | Details |
| GB492928A | Improvements in and relating to methods of coating articles… | Expired / Lapsed | 1937-10-06 | — | 0 | Details |
| GB497147A | Improvements in and relating to radio direction and range f… | Expired / Lapsed | 1937-04-09 | — | 0 | Details |
| GB482548A | Improvements in the electric deposition of resin films | Expired / Lapsed | 1937-03-31 | — | 0 | Details |
| GB470897A | Improvements in and relating to dielectric materials | Expired / Lapsed | 1936-12-12 | — | 0 | Details |
| GB497034A | Improvements in and relating to dry rectifiers | Expired / Lapsed | 1936-06-11 | — | 0 | Details |
| GB453929A | Improvements in and relating to electric heating pads or th… | Expired / Lapsed | 1934-12-15 | — | 0 | Details |
| GB409638A | Improvements in and relating to screw compressors | Expired / Lapsed | 1934-01-03 | — | 0 | Details |
| GB434477A | Improvements in and relating to methods of recording and re… | Expired / Lapsed | 1933-11-30 | — | 0 | Details |
| GB426002A | Improvements in and relating to the production of electric … | Expired / Lapsed | 1933-09-28 | — | 0 | Details |
| GB391742A | Improvements in and relating to circuits for electric relays | Expired / Lapsed | 1933-01-21 | — | 0 | Details |
| GB382939A | Improvements in and relating to television apparatus | Expired / Lapsed | 1932-09-19 | — | 0 | Details |
| GB391006A | Improvements in and relating to apparatus for recording ele… | Expired / Lapsed | 1932-08-18 | — | 0 | Details |
| GB384527A | Improvements in and relating to electric cooking apparatus | Expired / Lapsed | 1932-04-12 | — | 0 | Details |
| GB389855A | Improvements in and relating to electric amplifying circuits | Expired / Lapsed | 1931-09-25 | — | 0 | Details |
| GB378442A | Improvements in and relating to circuits employing electric… | Expired / Lapsed | 1931-05-06 | — | 0 | Details |
| GB363835A | An improved flanged joint for pipes and the like | Expired / Lapsed | 1930-12-23 | — | 0 | Details |
| GB371329A | Improvements in and relating to methods of recording and/or… | Expired / Lapsed | 1930-10-17 | — | 0 | Details |
| GB261384A | Improvements in or relating to electric selective distant c… | Expired / Lapsed | 1926-11-10 | — | 0 | Details |
| GB260210A | Improvements in and relating to insulating compositions | Expired / Lapsed | 1926-05-17 | — | 0 | Details |
| GB163079A | Improvements in and relating to the ventilation of dynamo e… | Expired / Lapsed | 1920-01-08 | — | 0 | Details |
| US3025443A | Dynamo-electric machines | Expired / Lapsed | 1959-04-13 | 1962-03-13 | 0 | Details |
| US2866928A | Electric rectifiers employing semi-conductors | Expired / Lapsed | 1956-05-21 | 1958-12-30 | 0 | Details |
| US2866117A | Electroluminescent panel | Expired / Lapsed | 1956-04-11 | 1958-12-23 | 2 | Details |
| US2852722A | Electric rectifiers employing semi-conductors | Expired / Lapsed | 1956-07-30 | 1958-09-16 | 0 | Details |
| US2837707A | Servosystem controlled contour machining apparatus | Expired / Lapsed | 1955-01-19 | 1958-06-03 | 0 | Details |
| US2831981A | Photo-electric relay apparatus | Expired / Lapsed | 1955-04-25 | 1958-04-22 | 0 | Details |
| US2769962A | Cooling means for laminated magnetic cores | Expired / Lapsed | 1953-07-01 | 1956-11-06 | 0 | Details |
| US2652502A | Pulse generating circuit | Expired / Lapsed | 1952-09-20 | 1953-09-15 | 0 | Details |
| US1921756A | Improvements in and relating to the manufacture of syntheti… | Expired / Lapsed | — | 1933-08-08 | 0 | Details |
| GB190618487A | Improvements in and relating to Electric Conductors suitabl… | Expired / Lapsed | 1906-08-17 | 1907-06-06 | 0 | Details |