(19)

(11)

EP 0 353 249 A1

(12)

(43) Date of publication: 07.02.1990 Bulletin 1990/06 (21) Application number: 88904083.0 (22) Date of filing: 01.04.1988

(51) International Patent Classification (IPC):  G06F 15/ 16( . ) G06F 15/ 173( . ) G06F 13/ 40( . ) G06F 11/ 08( . ) (86) International application number: PCT/US1988/001184 (87) International publication number: WO 1988/008167 (20.10.1988 Gazette 1988/23)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 06.04.1987 US 19870034881 (71) Applicant: LEE DATA CORPORATION Eden Prairie, MN 55344 (US)	(72) Inventors: PIHL, Douglas, M. St. Paul, MN 55113 (US) CONNELL, Gary, D. Maple Plain, MN 55359 (US) HEDIN, John, M. Coon Rapids, MN 55433-5367 (US) WILSON, Blair, A. Minneapolis, MN 55409 (US) HARDY, John, D., Jr. Chaska, MN 55318 (US) (74) Representative: Strehl Schübel-Hopf Groening & Partner  Maximilianstrasse 54 D-80538 München D-80538 München (DE)