General Radio Co
General RaActive Patents
0
Total Holdings
10
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2715718A | Voltage-selection and comparison system and method | Expired / Lapsed | 1954-05-13 | 1955-08-16 | 0 | Details |
| US2374248A | Pulse-integrating circuit | Expired / Lapsed | 1941-12-02 | 1945-04-24 | 0 | Details |
| US2362503A | Frequency-measuring-device | Expired / Lapsed | 1941-12-10 | 1944-11-14 | 0 | Details |
| US2298177A | Electric filter circuit | Expired / Lapsed | 1939-05-25 | 1942-10-06 | 0 | Details |
| US2119389A | Frequency meter | Expired / Lapsed | 1935-12-06 | 1938-05-31 | 0 | Details |
| US2104336A | Electric system | Expired / Lapsed | 1932-07-30 | 1938-01-04 | 0 | Details |
| US2009013A | Alternating-current apparatus | Expired / Lapsed | 1934-06-01 | 1935-07-23 | 0 | Details |
| US1944315A | Electric system and method | Expired / Lapsed | 1931-10-22 | 1934-01-23 | 0 | Details |
| US1901343A | Electric instrument | Expired / Lapsed | 1931-03-30 | 1933-03-14 | 0 | Details |
| US1874196A | Sound ranging system | Expired / Lapsed | 1928-07-16 | 1932-08-30 | 0 | Details |