Document Type and Number:
United States Patent 2522609
Publication Date:
09/19/1950
Assignee:
Sadir, Carpentier Soc FR.
Other Classes:
333/139, 340/825.610, 708/670, 327/31
International Classes:
H04L15/26; H04L15/00
US Patent References:
| 2396211 | Selective calling signal device | | | |
| 2403561 | Multiplex control system | | | |
| 2415359 | Wave-signal translating system | | | |