. . . "nClient-server system, server access authentication method, memory medium stores server-access authentication programs, and issuance device which issues the memory medium contentsUS60919513 Sep 199718 Jul 2000Telxon CorporationSeamless roaming among multiple networksUS609811612 Abr 19961 Ago 2000Fisher-Rosemont Systems, Inc.Process control system including a method and apparatus for automatically" . .