|
GB725902A
|
Apparatus for the repetition of parts of automatic telephon… |
Expired / Lapsed
|
1953-08-06 |
— |
0 |
Details
|
|
US2782255A
|
Telephonograph |
Expired / Lapsed
|
1951-12-31 |
1957-02-19 |
0 |
Details
|
|
US2773123A
|
Method and device for distant control of a telephonograph b… |
Expired / Lapsed
|
1951-12-27 |
1956-12-04 |
0 |
Details
|
|
US2709202A
|
Method for the coded remote control of a telephonograph ove… |
Expired / Lapsed
|
1950-10-16 |
1955-05-24 |
0 |
Details
|