Siemens Brothers and Co Ltd
Siemens BrActive Patents
0
Total Holdings
6
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2416086A | Automatic selecting switch | Expired / Lapsed | 1945-01-08 | 1947-02-18 | 0 | Details |
| US2358145A | Telephone or like impulsing system | Expired / Lapsed | 1942-10-07 | 1944-09-12 | 0 | Details |
| US2266503A | Telephone system | Expired / Lapsed | 1940-05-24 | 1941-12-16 | 0 | Details |
| US1970455A | Electric selector | Expired / Lapsed | 1930-04-26 | 1934-08-14 | 0 | Details |
| US1956371A | Telephone system | Expired / Lapsed | 1932-06-02 | 1934-04-24 | 0 | Details |
| US1922237A | Automatic telephone system | Expired / Lapsed | 1931-07-13 | 1933-08-15 | 0 | Details |