BBC Brown Boveri AG Germany
BBC BrownActive Patents
0
Total Holdings
31
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3621390A | Arrangement for measuring a time variable magnetic field us… | Expired / Lapsed | 1969-04-22 | 1971-11-16 | 8 | Details |
| US3524126A | Transformer for transmitting pulses or power at stepped hig… | Expired / Lapsed | 1968-04-01 | 1970-08-11 | 0 | Details |
| US3457871A | Self-priming centrifugal pump | Expired / Lapsed | 1968-02-12 | 1969-07-29 | 0 | Details |
| US3437889A | Controllable semiconductor element | Expired / Lapsed | 1966-11-14 | 1969-04-08 | 0 | Details |
| US3406326A | Frequency changer employing parallel connected main and aux… | Expired / Lapsed | 1966-10-06 | 1968-10-15 | 0 | Details |
| US3346794A | Inverter circuit for supplying current to polyphase motors | Expired / Lapsed | 1965-04-12 | 1967-10-10 | 2 | Details |
| US2759111A | Transistor trigger circuit | Expired / Lapsed | 1952-06-26 | 1956-08-14 | 0 | Details |
| US2753503A | Reversible motor control system for regulating a variable | Expired / Lapsed | 1953-02-19 | 1956-07-03 | 0 | Details |
| US2533859A | Improved injection system for magnetic induction accelerato… | Expired / Lapsed | 1947-06-02 | 1950-12-12 | 0 | Details |
| US2465682A | Moving contact electric current converter | Expired / Lapsed | 1947-08-07 | 1949-03-29 | 0 | Details |
| US2441484A | Protective device for directcurrent plants | Expired / Lapsed | 1944-04-10 | 1948-05-11 | 0 | Details |
| US2326072A | Gas turbine plant | Expired / Lapsed | 1940-06-08 | 1943-08-03 | 0 | Details |
| US2306953A | Gas turbine plant for propulsion of water and air craft | Expired / Lapsed | 1938-08-05 | 1942-12-29 | 0 | Details |
| US2293296A | Arrangement for the sparkless interruption of currents | Expired / Lapsed | 1941-01-08 | 1942-08-18 | 0 | Details |
| US2288734A | Gas purifying turbine plant | Expired / Lapsed | 1939-11-07 | 1942-07-07 | 0 | Details |
| US2284829A | Ultra high frequency receiving device | Expired / Lapsed | 1941-03-06 | 1942-06-02 | 0 | Details |
| US2279239A | High tension transformer | Expired / Lapsed | 1938-10-03 | 1942-04-07 | 0 | Details |
| US2236426A | Turbine blade | Expired / Lapsed | 1939-07-21 | 1941-03-25 | 0 | Details |
| US2227666A | Starting up system for heat producing and consuming plants | Expired / Lapsed | 1937-11-15 | 1941-01-07 | 0 | Details |
| US2220420A | Means for cooling machine parts | Expired / Lapsed | 1939-02-09 | 1940-11-05 | 0 | Details |
| US2219994A | Gas turbine plant and regulating system therefor | Expired / Lapsed | 1938-08-30 | 1940-10-29 | 0 | Details |
| US2187646A | Separator | Expired / Lapsed | 1936-08-04 | 1940-01-16 | 0 | Details |
| US1935659A | Pressureproof combustion chamber | Expired / Lapsed | 1931-08-20 | 1933-11-21 | 0 | Details |
| US1903001A | Protective system | Expired / Lapsed | 1930-01-18 | 1933-03-28 | 0 | Details |
| US1873952A | Method and apparatus for suppressing harmonics in direct cu… | Expired / Lapsed | 1926-03-03 | 1932-08-30 | 0 | Details |
| US1833064A | Regulating means for blowers | Expired / Lapsed | 1928-02-10 | 1931-11-24 | 0 | Details |
| US1765360A | Rotary pump | Expired / Lapsed | 1927-02-07 | 1930-06-24 | 0 | Details |
| US1766666A | Steam separator | Expired / Lapsed | 1926-06-07 | 1930-06-24 | 0 | Details |
| US1759074A | Liquid-sealed gland for machine shafts | Expired / Lapsed | 1927-06-03 | 1930-05-20 | 0 | Details |
| US1646048A | Automatic regulating apparatus for electric furnaces | Expired / Lapsed | 1925-04-21 | 1927-10-18 | 0 | Details |
| GB190804157A | Multistage Re-action Steam Turbines. | Expired / Lapsed | 1908-02-24 | 1908-07-09 | 0 | Details |