US 2015/0205081 A1↗2015Assignee: Canon Inc.Inventors: Akira MizumaExample 1CANON EF 35mm f/2 IS USM— 10 ELEMENTS / 8 GROUPS, 35mm f/2 (production)
JP 2018-132674 A↗2018Assignee: Canon Inc.Inventors: Akira MizumaExample 1CANON TS-E 135mm f/4 L MACRO— 11 elements / 7 groups, f = 132.97 mm design (135 mm marketed)