FR976409A
(en )
1951-03-19
Periodically reversed current electroplating apparatus
FR1113390A
(en )
1956-03-28
Linear frequency modulation detector
CH312608A
(en )
1956-01-31
Contact converter with contacts oscillating synchronously with the frequency of the alternating current
FR1110195A
(en )
1956-02-07
Frequency demodulator
CH268993A
(en )
1950-06-15
AC alarm clock.
CH310997A
(en )
1955-11-15
High frequency contact bridge.
CH343003A
(en )
1959-12-15
Switching device for alternating current networks
FR64333E
(en )
1955-11-09
Oscillating switch
FR1114389A
(en )
1956-04-11
Frequency discriminator
AT175305B
(en )
1953-06-25
Electrolytic alternating current meter
FR943443A
(en )
1949-03-08
High frequency alternating current electronic generators
FR1048331A
(en )
1953-12-21
Frequency modulated electric oscillators
FR1085915A
(en )
1955-02-08
Cleaning utensil
FR1092410A
(en )
1955-04-21
Synchronized oscillator
FR1044992A
(en )
1953-11-23
Synchronous oscillating compressor for alternating current
CH327601A
(en )
1958-01-31
Circuit arrangement for signaling by means of alternating current of any frequency
CH319135A
(en )
1957-01-31
Electric frequency converter
FR1099935A
(en )
1955-09-14
Switch-contact element
CH335725A
(en )
1959-01-31
High frequency oscillator
FR1092317A
(en )
1955-04-20
Metadynes under alternating current
DK97831C
(en )
1964-01-27
Apparatus for reducing the frequency of an alternating current.
FR62560E
(en )
1955-06-15
Synchronous oscillating compressor for alternating current
FR1112850A
(en )
1956-03-19
Frequency discriminator circuit
CH309000A
(en )
1955-08-15
Electric frequency converter.
CH325324A
(en )
1957-10-31
Circuit arrangement for frequency modulation