Portable communication device

Details Portable communication device Portable communication device

2005-08-30

2005-08-30

Tieu, Binh K. (Department: 2643)

Telecommunications

Radiotelephone system

Special service

C455S550100, C379S202010, C379S399020

Reexamination Certificate

active

06937852

ABSTRACT:
A portable communication device for conference calls, comprising at least first and second speech encoder paths with first and second inputs for connection to first and second recording devices, respectively, and at least one output connected to signal processor means for receiving and processing first and second electronic signals from said recording devices via said first and second speech encoder paths for transmission to a transmitter/receiver operatively connected to said signal processor means, wherein said apparatus is adpated to receive said first and second electronic signals simultaneously even if the signals are different, and said apparatus comprises a summator adapted to sum said first and second electronic signals into a sum signal for transmission to said transmitter/receiver.

REFERENCES:
patent: 5546458 (1996-08-01), Iwami
patent: 6012024 (2000-01-01), Hofmann
patent: 6078809 (2000-06-01), Proctor
patent: 6289313 (2001-09-01), Heinonen et al.
patent: 6321080 (2001-11-01), Diethorn
patent: 6839417 (2005-01-01), Weisman et al.
patent: 2 332 130 (1999-06-01), None
patent: 1114245 (1989-05-01), None
International-Type Search Report completed Jun. 21, 2001 by Antonio Farieta.

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