(19)

(11)

EP 0 461 107 A1

(12)

(43) Date of publication: 18.12.1991 Bulletin 1991/51 (21) Application number: 89904981.0 (22) Date of filing: 09.03.1989

(51) International Patent Classification (IPC):  H04H 1/ 00( . ) H04H 60/ 33( . ) H04M 11/ 00( . ) H04N 7/ 03( . ) H04N 7/ 08( . ) H04N 7/ 14( . ) H04N 7/ 16( . ) G06Q 30/ 00( . ) H04H 60/ 94( . ) H04N 7/ 025( . ) H04N 7/ 035( . ) H04N 7/ 081( . ) H04N 17/ 00( . ) (86) International application number: PCT/US1989/000943 (87) International publication number: WO 1990/010988 (20.09.1990 Gazette 1990/22)

(84) Designated Contracting States: CH DE FR GB IT LI (71) Applicant: VIEWFACTS, INC. Chicago, IL 60601 (US)	(72) Inventor: RUSSEL, Welsh, J Toronto, Ontario M4B 1G4 (CA) (74) Representative: Graalfs, Edo, Dipl.-Ing., et al  Postfach 30 24 30 D-20308 Hamburg D-20308 Hamburg (DE)