|
US2718562A
|
Erase head |
Expired / Lapsed
|
1951-04-17 |
1955-09-20 |
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
|