Handset for a communication unit

Details Handset for a communication unit Handset for a communication unit

2007-01-09

2007-01-09

Gelin, Jean (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S090300

Reexamination Certificate

active

10283179

ABSTRACT:
A handset (1) for a communication unit is free from any howling problem even when an output of a speaker is considerably increased in use, wherein a conventional handset often suffers from the howling problem when the output of the speaker is considerably increased. In the handset (1) provided with a casing (11): a bone conduction speaker is housed in an upper portion of the casing (2); a microphone is housed in a lower portion of the casing (2); and, a sound aperture (5) of a microphone portion (4) of the casing (11), in which portion (4) the microphone is housed, is formed in a bottom surface of the casing (2) and/or a lower end side surface of the casing (2).

REFERENCES:
patent: 4463222 (1984-07-01), Paradowski
patent: 5136639 (1992-08-01), Brito
patent: 5857157 (1999-01-01), Shindo
patent: 6173058 (2001-01-01), Takada
patent: 6421444 (2002-07-01), Van Schyndel
patent: 6547620 (2003-04-01), Hatamura et al.
patent: 6957049 (2005-10-01), Takeda
patent: 2001/0028311 (2001-10-01), Kumar
patent: 19 18 985 (1969-11-01), None
patent: 0496235 (1992-07-01), None
patent: 2000324217 (2000-11-01), None
patent: WO 94/03007 (1994-02-01), None

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