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2909619
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Information
Patent Grant
2909619
References
Source
Patent Number
2,909,619
Date Filed
Not available
Date Issued
Tuesday, October 20, 1959
64 years ago
CPC
A44C7/00 - Ear-rings Devices for piercing the ear-lobes
H04R25/456 - mechanically
H04R25/604 - Arrangements for mounting transducers
H04R25/652 - Ear tips; Ear moulds
H04R2225/59 - Arrangements for selective connection between one or more amplifiers and one or more receivers within one hearing aid
H04R2225/61 - Aspects relating to mechanical or electronic switches or control elements in hearing aids
US Classifications
381 - Electrical audio signal processing systems and devices
D24 - Medical and laboratory equipment
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