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WOLFF MAUNOURY ET CIE SOC
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WOLFF MAUNOURY ET CIE SOC
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Publication of GB191200881ApublicationCriticalpatent/GB191200881A/en
Application filed by WOLFF MAUNOURY ET CIE SOCfiledCriticalWOLFF MAUNOURY ET CIE SOC
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
H04R1/00—Details of transducers, loudspeakers or microphones
H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
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Health & Medical Sciences
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Public Health
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Physics & Mathematics
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Engineering & Computer Science
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Acoustics & Sound
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Signal Processing
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Thermotherapy And Cooling Therapy Devices
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Abstract
881. Soc. Wolff Maunoury et Cie. Feb. 9, 1911, [Convention date]. Drawings to Specification. Sanitary and hygienic devices.-The ear-piece of a telephone is provided with a hygienic pad of successively detachable papers, having a central aperture through which the sound may reach the ear.
GB191200881D1911-02-091912-01-11Improvements in or relating to Telephonic Receivers.
Expired - LifetimeGB191200881A
(en)