Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2004-01-08
2009-06-23
Anderson, Matthew D (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S569100, C455S569200, C455S575100, C455S556100, C381S370000, C381S375000, C381S380000, C379S430000
Reexamination Certificate
active
07551940
ABSTRACT:
A two-way voice communication device which provides a high-level of acoustic noise reduction is disclosed. A resilient ear tip provides acoustic isolation and secures the earphone within the ear canal of the user. The ability to rotate the earphone within the ear canal allows the user to easily position an attached microphone. The audio signals may be conveyed by an included radio frequency receiver and radio frequency transmitter, or the earphone may be connected to an electrical audio device using a multi-conductor cable. Audio signals may be conveyed to one or both ears of a user. A switch to mute the audio signal from the microphone, or for supporting a push-to-talk mode of operation, may be included in the earphone housing, or on the cable.
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Drambarean Viorel
Haapapuro Andrew J.
Killion Mead C.
Paulson Mary
Schulein Robert B.
Anderson Matthew D
Etymotic Research Inc.
Huang Wen W
McAndrews Held & Malloy Ltd.
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