FR1167071A
(en )
1958-11-20
High frequency coupling device
CH327938A
(en )
1958-02-15
High frequency coupling device
FR1289329A
(en )
1962-03-30
high frequency transmitter
FR1134162A
(en )
1957-04-08
Improvements related to high frequency transmitting windows
AT190977B
(en )
1957-07-25
Arrangement for the transmission of signal pulses via carrier frequency channels by keying
CH328588A
(en )
1958-03-15
Apparatus for displaying the coincidence of a plurality of signals
CH420276A
(en )
1966-09-15
Apparatus for the transmission of signals through modulated oscillations of constant amplitude
FR1133943A
(en )
1957-04-03
Telegraph transmitter
AT183788B
(en )
1955-11-10
Arrangement for the transmission of signals
CH332681A
(en )
1958-09-15
Single sideband receiver for voice signals
AT190550B
(en )
1957-07-10
Carrier wave telephone transmitters for the transmission of single sideband voice signals
FR1115778A
(en )
1956-04-30
Frequency modulator device
FR1121369A
(en )
1956-08-13
Pile driving bell
FR1129797A
(en )
1957-01-25
Advanced Frequency Modulation Radio Receiver
FR1103962A
(en )
1955-11-15
Balanced frequency modulator
CH343449A
(en )
1959-12-31
Circuit arrangement for counting pulses
FR1130901A
(en )
1957-02-13
Frequency doubling device
FR1104552A
(en )
1955-11-22
telegraph signal transmitter
CH324090A
(en )
1957-08-31
Procedure for securing the transmission of message pulse groups
CH345670A
(en )
1960-04-15
Carrier frequency communication system
FR67323E
(en )
1958-02-20
Frequency modulator device
FR67322E
(en )
1958-02-20
Frequency modulator device
CH325324A
(en )
1957-10-31
Circuit arrangement for frequency modulation
CH336446A
(en )
1959-02-28
Apparatus for converting digit code signals into signals of corresponding amplitude
FR1133179A
(en )
1957-03-21
Improvements to frequency discriminators