FR1107939A
(en )
1956-01-06
Telephone communication system
NL187883B
(en )
AM RECEIVER.
BE541150A
(en )
1959-08-14
RURAL CARRIER WAVE TELEPHONE TRANSMISSION SYSTEM.
FR1182387A
(en )
1959-06-24
Signal transmission system, especially for telephone calls
CH266246A
(en )
1950-01-15
Transmitter for a carrier wave telephony system.
DK90577C
(en )
1961-03-13
Carrier telephony transmitter for transmitting single sideband voice signals.
FR1133943A
(en )
1957-04-03
Telegraph transmitter
CH301274A
(en )
1954-08-31
Single sideband carrier frequency telephone system.
DK92309C
(en )
1961-12-04
Single sideband receiver for voice signals.
CH332681A
(en )
1958-09-15
Single sideband receiver for voice signals
FR1180246A
(en )
1959-06-02
transmitter for telephone systems
CH342256A
(en )
1959-11-15
Equalizing telegraph transmitter
AT190550B
(en )
1957-07-10
Carrier wave telephone transmitters for the transmission of single sideband voice signals
FR1164610A
(en )
1958-10-13
Multiplex telegraph receiver
CH331068A
(en )
1958-06-30
Teletype transmitter
DK90980C
(en )
1961-05-29
Telegraph transmitter.
FR1116210A
(en )
1956-05-04
Telegraph transmitter
FR1171986A
(en )
1959-02-04
Receiving teleprinter for Morse signals
CH345670A
(en )
1960-04-15
Carrier frequency communication system
FR1104552A
(en )
1955-11-22
telegraph signal transmitter
CH309043A
(en )
1955-08-15
Teletype receiver.
FR1092133A
(en )
1955-04-19
Telephone bell
DK71003C
(en )
1950-05-15
Transmitter connection for carrier telephone systems.
DK90329C
(en )
1961-01-30
Single-sided tape equipment for transmitting voice signals.
DK77797C
(en )
1954-07-12
Single sideband carrier telephony system.