US 2,397,565↗1946Assignee: Eastman Kodak CompanyInventors: Willy SchadeExample 1KODAK EKTAR 52mm f/1.5— 7 ELEMENTS / 4 GROUPS, f = 52.0207 mm (scaled design)
US 2,983,193↗1961Assignee: Eastman Kodak CompanyInventors: Willy SchadeSole exampleKODAK AERO EKTAR 6 in f/3.5— 6 ELEMENTS / 4 GROUPS, f = 152.58 mm