US 3,748,021↗1973Assignee: Canon Inc.Inventors: Akira Tajima, Kikuo MomiyamaCanon FD 24mm f/2.8 S.S.C.— 24mm f/2.8, 9 elements / 8 groups
US 3,748,022↗1973Assignee: Canon Inc.Inventors: Akira TajimaCANON FD 35mm f/2 S.S.C. (I)— 35mm f/2, 9 elements / 8 groups