Headphone amplifier

Electrical audio signal processing systems and devices – With amplifier

Reexamination Certificate

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Details

C381S074000

Reexamination Certificate

active

07095862

ABSTRACT:
A compact portable stereo headphone amplifier system for use with a conventional stereo audio source, such as a cassette or compact disc player, in which components are located on both sides of a circuit board and in which left channel components and right channel components are located on opposite sides of the circuit board thereby providing a compact unit.

REFERENCES:
patent: 6157545 (2000-12-01), Janninck et al.
patent: 6763111 (2004-07-01), Liao
patent: 6801611 (2004-10-01), Guccione et al.
patent: 2001/0043705 (2001-11-01), Wilmink
patent: 2002/0049003 (2002-04-01), Narumi et al.
patent: 2002/0080985 (2002-06-01), Ho
patent: 2004/0096073 (2004-05-01), Kim, II
patent: 2004/0158846 (2004-08-01), Aizawa et al.

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