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(11)

EP 3 732 688 A1

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(43) Date of publication: 04.11.2020 Bulletin 2020/45 (21) Application number: 18896915.8 (22) Date of filing: 28.12.2018

(51) International Patent Classification (IPC):  G16C 20/50(2019.01) G16C 20/40(2019.01) G16C 20/30(2019.01) G16C 20/90(2019.01) (86) International application number: PCT/US2018/067939 (87) International publication number: WO 2019/133858 (04.07.2019 Gazette 2019/27)

(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: 29.12.2017 US 201762611678 P 27.06.2018 US 201816020058 (71) Applicants: Leighton, Bonnie Berger Newtonville, MA 02460 (US) Cho, Hyunghoon Plano, TX 75024 (US) Hie, Brian Plano TX 75024 (US)

(72) Inventors: Leighton, Bonnie Berger Newtonville, MA 02460 (US) Cho, Hyunghoon Plano, TX 75024 (US) Hie, Brian Plano TX 75024 (US) (74) Representative: TLIP Limited  14 King Street Leeds LS1 2HL Leeds LS1 2HL (GB)