Class 381/178 - Vibrating electrical contract

Subclass of Class 381 - Electrical audio signal processing systems and devices
Definition: Subject matter in which two elements have an area of intermittent
No. of patents: 3
Last issue date: 01/03/2012

Number	Title	Issue Date
8090125	Contact type electret condenser pickup A contact type electret condenser pickup to deliver high anti noise, top talking quality, and comprehensive range of applications includes a casing provided with an accommodation chamber to contain an O-ring, a vibration part, an insulation packing, a back plate ret...	01/03/2012
6438243	Vibration wave detector A vibration wave detector having a first diaphragm for receiving vibration waves, such as sound waves and so on, to be propagated in a medium, a resonant unit having a plurality of cantilever resonators each having such a length as to resonate at an indiv...	08/20/2002
4542264	Lead-frame for an electric microphone A lead frame for an electric microphone which includes an H-shaped structure of thin metallic material including spaced parallel legs and a crossbar therebetween. A first plate is spaced from the crossbar and is located between the legs. A lead connects t...	09/17/1985

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