PATENTS RES CORP
PATENTS REActive Patents
0
Total Holdings
7
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2413620A | Direction finding system | Expired / Lapsed | 1940-06-19 | 1946-12-31 | 0 | Details |
| US2404160A | Electric control system | Expired / Lapsed | 1939-06-14 | 1946-07-16 | 0 | Details |
| US2368052A | Electric translating system | Expired / Lapsed | 1941-04-29 | 1945-01-23 | 0 | Details |
| US2361731A | Reactance system | Expired / Lapsed | 1940-12-12 | 1944-10-31 | 0 | Details |
| US2321370A | Hearing and system | Expired / Lapsed | 1941-04-29 | 1943-06-08 | 0 | Details |
| US2315043A | Electric amplifier system | Expired / Lapsed | 1940-03-29 | 1943-03-30 | 0 | Details |
| US2311631A | Discharge tube oscillator | Expired / Lapsed | 1940-08-22 | 1943-02-23 | 0 | Details |