(19)

(11)

EP 0 966 813 A2

(12)

(43) Date of publication: 29.12.1999 Bulletin 1999/52 (21) Application number: 98939048.0 (22) Date of filing: 09.03.1998

(51) International Patent Classification (IPC):  H04L 9/ 08( . ) H04L 9/ 32( . ) H04L 9/ 14( . ) (86) International application number: PCT/US1998/004408 (87) International publication number: WO 1998/047258 (22.10.1998 Gazette 1998/42)

(84) Designated Contracting States: DE FI FR GB (30) Priority: 10.03.1997 US 19970813457 (71) Applicants: Fielder, Guy L. Austin, TX 78703 (US) Alito, Paul N. Austin, TX 78729 (US)	(72) Inventors: Fielder, Guy L. Austin, TX 78703 (US) Alito, Paul N. Austin, TX 78729 (US) (74) Representative: Schmitz, Jean-Marie, et al  Dennemeyer & Associates Sàrl P.O. Box 1502 1015 Luxembourg 1015 Luxembourg (LU)