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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Application grantedgrantedCritical
Publication of FR747227ApublicationCriticalpatent/FR747227A/fr
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
Landscapes
Engineering & Computer Science
(AREA)
Manufacturing & Machinery
(AREA)
Physics & Mathematics
(AREA)
Acoustics & Sound
(AREA)
Signal Processing
(AREA)
Diaphragms For Electromechanical Transducers
(AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups
(AREA)
FR747227D1931-12-231932-12-08Dispositif destiné à la transformation d'oscillations électriques en vibrations sonores ou inversement
ExpiredFR747227A
(fr)