Issei Tanaka — Lens Patent Author | Surface & Stop

Issei Tanaka2 related patents across 2 interactive lens diagrams.
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Nikon Corporation (2)
Nikon Corporation(2)US 2011/0170195 A1↗2011Assignee: Nikon Corporation
Inventors: Mami Muratani, Issei Tanaka
NIKON AF-S DX MICRO-NIKKOR 40mm f/2.8G— PATENT: 9 ELEMENTS / 8 GROUPS, PRODUCTION: 9 ELEMENTS / 7 GROUPS
WO 2014/061226 A1↗2014Assignee: Nikon Corporation
Inventors: Kumiko Ishida, Issei Tanaka
NIKON 1 NIKKOR 32mm f/1.2— 9 elements / 7 groups, f = 32.402 mm design