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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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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Application filed by Telefonaktiebolaget LM Ericsson ABfiledCriticalTelefonaktiebolaget LM Ericsson AB
Priority to ES0064952UpriorityCriticalpatent/ES64952Y/en
Publication of ES64952UpublicationCriticalpatent/ES64952U/en
Application grantedgrantedCritical
Publication of ES64952YpublicationCriticalpatent/ES64952Y/en
A hollow box for handsets, particularly for tabletop vertical handsets, having a funnel-shaped part that transversely to the plane of symmetry is bordered by two curved walls having different curvatures, the interior space of said funnel-shaped part containing the receiver and forming a connection cavity between the receiver and the microphone, characterized in that in order to affect the acoustic reaction between the microphone and the receiver and in order to produce a displacement of its natural frequency, the convex wall outwards from the part in funnel shape is provided on its inner side with ribs, the dimensions of which conform to the desired shape and size of the air space in said funnel-shaped part. (Machine-translation by Google Translate, not legally binding)
ES0064952U1957-08-031957-08-03
A hollow box for handsets
ExpiredES64952Y
(en)