(19)

(11)

EP 0 238 640 A1

(12)

(43) Date of publication: 30.09.1987 Bulletin 1987/40 (21) Application number: 86906163.0 (22) Date of filing: 26.09.1986

(51) International Patent Classification (IPC):  B61L 25/ 04( . ) G08B 5/ 40( . ) G07C 9/ 00( . ) (86) International application number: PCT/US1986/002008 (87) International publication number: WO 1987/002165 (09.04.1987 Gazette 1987/08)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 27.09.1985 US 19850780938 (71) Applicant: RAJ, Phani K. Lexington, MA 02173 (US)	(72) Inventor: RAJ, Phani K. Lexington, MA 02173 (US)