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Priority to DD16448772ApriorityCriticalpatent/DD103077A2/xx
Priority to DE19732334740prioritypatent/DE2334740A1/de
Publication of DD103077A2publicationCriticalpatent/DD103077A2/xx
H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
H04R17/08—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously