British Thomson Houston Co Ltd
British ThActive Patents
0
Total Holdings
29
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 |
| 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 |
| 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 |
| GB590886A | Improvements in frequency responsive means particularly for… | Expired / Lapsed | 1944-02-22 | — | 0 | Details |
| GB539093A | Improvements in and relating to cores for electrical appara… | Expired / Lapsed | 1940-06-21 | — | 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 |
| 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 |
| 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 |
| GB384527A | Improvements in and relating to electric cooking apparatus | Expired / Lapsed | 1932-04-12 | — | 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 |
| 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 |
| 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 |