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Application filed by Grundig Emv, Grundig MaxfiledCriticalGrundig Emv
Application grantedgrantedCritical
Publication of AT273522BpublicationCriticalpatent/AT273522B/en
AT243868A1967-09-121968-03-12
Magnetic sound recording and / or playback device operated with a hand-held microphone, in particular a dictation device
AT273522B
(en)
Device for compensating for changes in the recording and playback speed in a sound recording and / or playback device, in particular a dictation device