NL187779B
(en )
AUDIO AMPLIFIER.
CH331575A
(en )
1958-07-31
Magnetic information storage device
DK105927C
(en )
1966-11-28
Sound reproduction system.
FR1107894A
(en )
1956-01-05
Magnetic recording device
NL179522B
(en )
DEVICE FOR RECORDING AND / OR DISPLAYING INFORMATION ON, OR FROM, A MAGNETIC BAND INCLUDED IN A CASSETTE.
NL189735B
(en )
MAGNETIC RECORDING AND / OR DISPLAY DEVICE.
NL189160B
(en )
MAGNETIC RECORDING MEDIA.
BE541087A
(en )
1959-08-14
STEREOPHONIC SOUND REPRODUCTION.
AT195138B
(en )
1958-01-25
Sound recording and reproducing device
CH334699A
(en )
1958-12-15
Magnetic sound recording and playback device
AT191630B
(en )
1957-09-10
Sound recording and playback device
GR14842B
(en )
1953-11-25
SOUND RECORDING AND REPRODUCTION DEVICE.
CH319629A
(en )
1957-02-28
Sound recording and reproducing device
AT194154B
(en )
1957-12-27
Magnetic sound recording and reproducing device
CH289208A
(en )
1953-02-28
Magnetic sound recording and reproducing device.
DK87911C
(en )
1959-09-28
Magnetic sound recording and reproducing apparatus.
NL185041C
(en )
DEVICE FOR RECORDING AND PLAYING BACK OF AUDIO INFORMATION ON, RESPECTIVELY OFF, A MAGNETIC SHEET.
FR1146793A
(en )
1957-11-14
Transportable sound recording and reproduction device
AT193628B
(en )
1957-11-25
Smallest sound recording and playback device
DK86119C
(en )
1958-08-25
Magnetic sound recording and reproducing apparatus.
FR1081761A
(en )
1954-12-22
Magnetic sound recording and reproduction device
FR1109824A
(en )
1956-02-02
Magnetic recording and reproducing device
DK88159C
(en )
1959-11-16
Magnetic recording and reproducing apparatus.
ES39636Y
(en )
1954-12-01
Enhanced phonograph record
DK86533C
(en )
1958-11-17
Recording device.