Telephone extension module

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment

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1403

Patent

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D04280008

REFERENCES:
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patent: D417222 (1999-11-01), Johnson et al.
Radio Shack .RTM., Amplified Equalizer Telephone ET-145, Owner's Manual, Cat. No. 43-598, .COPYRGT. 1994 Tandy Corporation.
POLYCOM .RTM., SoundPoint Pro Desktop Conference Phone 3-Line, User's Guide, .COPYRGT. 1998 Polycom, Inc.
SONY.RTM., 2-Line ID Telephone IT-M602, Operating Instructions, .COPYRGT. 1998 by Sony Corporation.
Radio Shack .RTM., ET-290 TrimFone Telephone, Owner's Manual, Cat. No. 43-585B/6B/7A, .COPYRGT. 1997 Tandy Corporation.
Nortel, Venture Multiline Communications Systems, User Guide, .COPYRGT. 1997 Northern Telecom.
CASIO PhoneMate, TI-360 Telephone with Digital Answering Machine & Call Waiting Caller ID Display, Owner's Guide.
Siemens, CSL 2000, CSL 3000, User Guide, .COPYRGT. Siemens GEC Communications Systems Limited 1998.
CIDCO, Screen Telephone 2100, .COPYRGT. 1997 by CIDCO Corporation.
GE, 2-9439 Three Line Business Telephone, User's Guide. No date given.
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GE sn#50219114 No date given.
Lucent 6424D+ No date given.
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Northern Telcom sn#NT2N30AA43 No date given.
Radio Shack ET-293 No date given.
Samsung LCD24B No date given.
Selsius Systems 30SP No date given.

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