(19)

(11)

EP 4 824 836 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 26716248.5 (22) Date of filing: 04.03.2026

(51) International Patent Classification (IPC):  H01F 30/08(2006.01) H01F 37/00(2006.01) H01F 3/06(2006.01) H01F 27/28(2006.01) H02J 50/12(2016.01) H01F 5/02(2006.01) (86) International application number: PCT/US2026/017653 (87) International publication number: WO 2026/187872 (10.09.2026 Gazette 2026/37)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH LA MA MD TN (30) Priority: 05.03.2025 US 202563767136 P (71) Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY Cambridge, MA 02139 (US)	(72) Inventors: COOKE, Chathan Belmont, MA 02478 (US) SALK, Noah Somerville, MA 02143 (US) (74) Representative: Valea AB  Box 1098 405 23 Göteborg 405 23 Göteborg (SE)