Stromberg Carlson Telephone Manufacturing Co
StrombergActive Patents
0
Total Holdings
17
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2395966A | Plan position indicator system | Expired / Lapsed | 1943-01-21 | 1946-03-05 | 0 | Details |
| US2362692A | Communication system | Expired / Lapsed | 1942-02-12 | 1944-11-14 | 0 | Details |
| US2320885A | Signaling system | Expired / Lapsed | 1941-03-21 | 1943-06-01 | 0 | Details |
| US2261822A | Telephone switchboard | Expired / Lapsed | 1940-03-13 | 1941-11-04 | 0 | Details |
| US2241158A | Automatic telephone system | Expired / Lapsed | 1939-09-21 | 1941-05-06 | 0 | Details |
| US2241156A | Selecting system | Expired / Lapsed | 1938-01-25 | 1941-05-06 | 0 | Details |
| US2205272A | Remotely controlled radio receiving system | Expired / Lapsed | 1938-06-11 | 1940-06-18 | 0 | Details |
| US2122643A | Switching key | Expired / Lapsed | 1937-08-28 | 1938-07-05 | 0 | Details |
| US2055363A | Remotely controlled radio receiving system | Expired / Lapsed | 1929-11-30 | 1936-09-22 | 0 | Details |
| US1992327A | Time controlled radio receiving system | Expired / Lapsed | 1931-02-06 | 1935-02-26 | 0 | Details |
| US1992326A | Remotely controlled radio receiving system | Expired / Lapsed | 1930-11-12 | 1935-02-26 | 0 | Details |
| US1897556A | Power supply system for vacuum tube amplieying devices | Expired / Lapsed | 1928-03-05 | 1933-02-14 | 0 | Details |
| US1873879A | Combined mechanical and electrical radio station selector | Expired / Lapsed | 1929-07-12 | 1932-08-23 | 0 | Details |
| US1851385A | Telephone system | Expired / Lapsed | 1931-06-01 | 1932-03-29 | 0 | Details |
| US1642684A | Vacuum-tube socket | Expired / Lapsed | 1925-08-26 | 1927-09-20 | 0 | Details |
| US1088878A | Electromagnetic device. | Expired / Lapsed | 1911-05-25 | 1914-03-03 | 0 | Details |
| US748078A | Fastening device. | Expired / Lapsed | 1903-08-03 | 1903-12-29 | 0 | Details |