(19)

(11)

EP 0 493 391 A1

(12)

(43) Date of publication: 08.07.1992 Bulletin 1992/28 (21) Application number: 90911606.0 (22) Date of filing: 23.07.1990

(51) International Patent Classification (IPC):  E04G 1/ 20( . ) (86) International application number: PCT/US1990/004143 (87) International publication number: WO 1991/003612 (21.03.1991 Gazette 1991/07)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 30.08.1989 US 19890400550 (71) Applicant: ANDERSON, Carl Staten Island, NY 10303 (US)	(72) Inventor: ANDERSON, Carl Staten Island, NY 10303 (US) (74) Representative: Schüler, Horst, Dr., et al  Patentanwalt, Kaiserstrasse 69 D-60329 Frankfurt D-60329 Frankfurt (DE)