(19)

(11)

EP 0 128 217 A1

(12)

(43) Date of publication: 19.12.1984 Bulletin 1984/51 (21) Application number: 84900429.0 (22) Date of filing: 09.12.1983

(51) International Patent Classification (IPC):  A63F 7/ 00( . ) A63F 9/ 00( . ) A63F 9/ 24( . ) G07F 17/ 34( . ) A63F 9/ 14( . ) (86) International application number: PCT/US1983/001940 (87) International publication number: WO 1984/002281 (21.06.1984 Gazette 1984/15)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 10.12.1982 US 19820448726 10.12.1982 US 19820448829 (71) Applicant: DIGITAL PRODUCTS CORPORATION Fort Lauderdale, FL 33334 (US)	(72) Inventors: FOLEY, Steven, L. Fort Lauderdale, FL 33334 (US) BOWER, David, S. Fort Lauderdale, FL 33334 (US) DAVIES, Ronald, C. Fort Lauderdale, FL 33534 (US)