Takashi Shirasuna — Lens Patent Author | Surface & Stop

Takashi Shirasuna2 related patents across 2 interactive lens diagrams.
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Canon Inc. (2)
Canon Inc.(2)US 2004/0223070 A1↗2004Assignee: Canon Inc.
Inventors: Takashi Shirasuna
CANON EF 28-105mm f/4-5.6— 10 ELEMENTS / 9 GROUPS, PATENT 28.91-101.32mm
US 2009/0296231 A1↗2009Assignee: Canon Inc.
Inventors: Takashi Shirasuna
CANON EF 70-200mm f/2.8 L IS II USM— 23 elements / 19 groups, Patent f = 72.14-193.97 mm