(19)

(11)

EP 4 771 437 A2

(12)

(88) Date of publication A3: 10.04.2025 (43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24772508.8 (22) Date of filing: 28.08.2024

(51) International Patent Classification (IPC):  G02B 6/38(2006.01) G02B 6/52(2006.01) (52) Cooperative Patent Classification (CPC): G02B 6/3821; G02B 6/3869; G02B 6/3888; G02B 6/3889; G02B 6/52; G02B 6/3851; G02B 6/387 (86) International application number: PCT/US2024/044239 (87) International publication number: WO 2025/049614 (06.03.2025 Gazette 2025/10)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 28.08.2023 US 202363534881 P (71) Applicant: AFL Telecommunications LLC Duncan, SC 29334 (US)	(72) Inventor: DONALDSON, Christopher Duncan, South Carolina 29334 (US) (74) Representative: Serjeants LLP  Dock 75 Exploration Drive Leicester, LE4 5NU Leicester, LE4 5NU (GB)