(19)

(11)

EP 0 388 452 A1

(12)

(43) Date of publication: 26.09.1990 Bulletin 1990/39 (21) Application number: 89909963.0 (22) Date of filing: 28.08.1989

(51) International Patent Classification (IPC):  G11B 7/ 08( . ) G11B 11/ 105( . ) G11B 23/ 03( . ) G11B 33/ 14( . ) G11B 7/ 085( . ) G11B 19/ 20( . ) G11B 25/ 04( . ) (86) International application number: PCT/US1989/003723 (87) International publication number: WO 1990/003642 (05.04.1990 Gazette 1990/08)

(84) Designated Contracting States: DE FR GB NL (30) Priority: 29.09.1988 US 19880251346 (71) Applicant: SUNDSTRAND DATA CONTROL, INC. Redmond, WA 98073-9701 (US)

(72) Inventors: MATTER, Dennis, Lynn Woodinville, WA 98072 (US) BOYLE, David, James Redmond, WA 98053 (US) ISAACSON, Mark Bothell, WA 98021 (US) YEE, Eddy, H., F. Bellevue, WA 98007 (US) MOORE, Daniel, Lowell Carnation, WA 98014 (US) CORNELIUS, Craig, J. Redmond, WA 98053 (US) (74) Representative: Marshall, John Grahame  SERJEANTS 25 The Crescent King Street Leicester LE1 6RX Leicester LE1 6RX (GB)