(19)

(11)

EP 4 396 840 A1

(12)

(43) Date of publication: 10.07.2024 Bulletin 2024/28 (21) Application number: 22773158.5 (22) Date of filing: 01.09.2022

(51) International Patent Classification (IPC):  G16H 50/20(2018.01) G16H 50/30(2018.01) (52) Cooperative Patent Classification (CPC): G16H 50/20; G16H 50/30 (86) International application number: PCT/EP2022/074380 (87) International publication number: WO 2023/031355 (09.03.2023 Gazette 2023/10)

(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: 01.09.2021 US 202163239857 P 30.08.2022 US 202217823505 (71) Applicant: Rockley Photonics Limited Altrincham, Cheshire WA14 2DT (GB)	(72) Inventors: WIERZYNSKI, Casimir Pasadena, California 91101 (US) GRADY, Daniel Carl Pasadena, California 91101 (US) PARK, Sangshik Pasadena, California 91101 (US) (74) Representative: Mewburn Ellis LLP  Aurora Building Counterslip Bristol BS1 6BX Bristol BS1 6BX (GB)