(19)

(11)

EP 0 963 221 A1

(12)

(43) Date of publication: 15.12.1999 Bulletin 1999/50 (21) Application number: 97925443.0 (22) Date of filing: 07.05.1997

(51) International Patent Classification (IPC):  A63B 53/ 04( . ) (86) International application number: PCT/US1997/007481 (87) International publication number: WO 1997/041928 (13.11.1997 Gazette 1997/49)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 08.05.1996 US 19960017083P 05.12.1996 US 19960760251 (71) Applicant: The Beta Group Menlo Park, CA 94025 (US)	(72) Inventors: KRUMME, John, F. Tahoe City, CA 96145 (US) DICKINSON, Frank, C. Redwood City, CA 94063 (US) (74) Representative: DIEHL GLAESER HILTL & PARTNER  Patentanwälte Augustenstrasse 46 80333 München 80333 München (DE)