(19)

(11)

EP 0 247 185 A1

(12)

(43) Date of publication: 02.12.1987 Bulletin 1987/49 (21) Application number: 87900428.0 (22) Date of filing: 26.11.1986

(51) International Patent Classification (IPC):  G08B 26/ 00( . ) (86) International application number: PCT/US1986/002560 (87) International publication number: WO 1987/003406 (04.06.1987 Gazette 1987/12)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 26.11.1985 US 19850801980 (71) Applicant: SENSOR SCAN, INC. Pleasant Hill, CA 94523 (US)	(72) Inventor: MARTIN, David, Michael, Jr. Berkeley, CA 94703 (US)