CH363378A
(en )
1962-07-31
Loudspeaker telephone system
FR1180456A
(en )
1959-06-04
Electro-dynamic speaker
DK106503C
(en )
1967-02-13
Telephone set.
FR1260478A
(en )
1961-05-05
Electro-dynamic microphone
BE575672A
(en )
1959-05-29
Telephone system.
DK94519C
(en )
1962-10-15
Electrodynamic device, in particular microphone or loudspeaker.
DK108209C
(en )
1967-10-16
Letter order.
FR1227086A
(en )
1960-08-18
Electro-dynamic device, in particular microphone or speaker
DK97830C
(en )
1964-01-27
Telephone set.
FR1225118A
(en )
1960-06-29
Telegraph system
BE579625A
(en )
1959-12-14
Electro-dynamic apparatus, in particular microphone or loudspeaker.
AT213460B
(en )
1961-02-27
Electrodynamic device, especially microphone or loudspeaker
NL143016B
(en )
1974-08-15
FLUIDUM AMPLIFIER.
BE574887A
(en )
1959-07-20
Loudspeaker telecommunication system.
DK112347B
(en )
1968-12-02
Electrodynamic sound repeater.
FR1188092A
(en )
1959-09-18
Advanced electrodynamic speaker
DK95138C
(en )
1963-01-14
Magnetic system with small spread, especially for use in speakers, microphones and similar devices.
FR1332315A
(en )
1963-07-12
Electro-dynamic speaker
BE588998A
(en )
1960-09-26
Magnet device, especially for loudspeakers, microphones, etc.
CH391002A
(en )
1965-04-30
Electrodynamic cone loudspeaker
FR1243701A
(en )
1960-10-14
Improvements in electro-magnetic, dynamo-electric and similar devices
BE596375A
(en )
1961-02-15
Acoustic membrane.
FR1229862A
(en )
1960-09-12
Device allowing resource bombardment
AU234667B2
(en )
Improvements in or relating to electrodynamic devices, more particularly microphones or loudspeakers
DK97760C
(en )
1964-01-20
Loudspeaker telephone system with several main stations.