(19)

(11)

EP 3 691 758 A2

(12)

(88) Date of publication A3: 06.06.2019 (43) Date of publication: 12.08.2020 Bulletin 2020/33 (21) Application number: 18864878.6 (22) Date of filing: 24.09.2018

(51) International Patent Classification (IPC):  A63B 21/005(2006.01) (86) International application number: PCT/US2018/052436 (87) International publication number: WO 2019/070436 (11.04.2019 Gazette 2019/15)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 02.10.2017 US 201715722745 02.10.2017 US 201715722761 02.10.2017 US 201715722739 02.10.2017 US 201715722719 (71) Applicant: Tonal Systems, Inc. San Francisco, CA 94103 (US)

(72) Inventors: ORADY, Aly, E. San Francisco CA 94103 (US) VALENTE, Michael San Francisco CA 94103 (US) WEATHERSPOON, Darryl San Francisco CA 94103 (US) STOTT, Bret, G. San Francisco CA 94103 (US) (74) Representative: Gill, David Alan  WP Thompson 138 Fetter Lane London EC4A 1BT London EC4A 1BT (GB)