United States Patent [w] Denker et al. US006064878A [ii] Patent Number: 6,064,878 [45] Date of Patent: May 16,2000 [54] METHOD FOR SEPARATELY PERMISSIONED COMMUNICATION [75] Inventors: John Stewart Denker, Leonardo, NJ; Christopher JCH Watkins, London, United Kingdom [73] Assignee: AT&T Corp., New York, NY [21] Appl. No.: 08/735,849 [22] Filed: Oct. 23, 1996 [51] Int.
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