Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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FADDA MICHEL
Original Assignee
FADDA MICHEL
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Filing date
Publication date
Application filed by FADDA MICHELfiledCriticalFADDA MICHEL
Priority to FR7204588ApriorityCriticalpatent/FR2171008A1/fr
Publication of FR2171008A1publicationCriticalpatent/FR2171008A1/fr
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
H04R19/00—Electrostatic transducers
H04R19/06—Gramophone pick-ups using a stylus; Recorders using a stylus
H04R19/10—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