US 2022/0066176 A1↗2022Assignee: Leica Camera AGInventors: Stefan Roth, Kathrin KellerSole exampleLEICA APO-SUMMICRON-M 35mm f/2 ASPH.— 10 ELEMENTS / 5 GROUPS, f = 35.0 mm (e-line, patent f = 1 × 35)