Digital closed network constructed from a telephone exchange and a key telephone system and signal transmission method of the digital closed network

Details for Australian Patent Application No. 2003231690 (hide)

International Classifications

Event Publications

21 August 2003 Complete Application Filed

Priority application(s): 091118642 19.08.02 TW

11 March 2004 Application Open to Public Inspection

Published as AU-B-2003231690

24 February 2005 Application Accepted

Published as AU-B-2003231690

23 June 2005 Standard Patent Sealed

12 March 2009 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

This patent ceased under section 143(a), or Expired. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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