AMPRO CORP
AMPRO CORPActive Patents
0
Total Holdings
5
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2718562A | Erase head | Expired / Lapsed | 1951-04-17 | 1955-09-20 | 0 | Details |
| US2574104A | Position and movement reproducing apparatus | Expired / Lapsed | 1946-07-01 | 1951-11-06 | 0 | Details |
| US2335435A | Cinematograph film feeding mechanism | Expired / Lapsed | 1940-04-15 | 1943-11-30 | 0 | Details |
| US2313662A | One-way clutch for cinematographs | Expired / Lapsed | 1941-07-21 | 1943-03-09 | 0 | Details |
| US2269952A | Film-controlled circuit switch for motion picture projectors | Expired / Lapsed | 1941-04-07 | 1942-01-13 | 0 | Details |