Koji Kato — Lens Patent Author | Surface & Stop

Koji Kato3 related patents across 3 interactive lens diagrams.
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Hoya Corporation (2)
Pentax Ricoh Imaging Company, Ltd. (1)
Hoya Corporation(2)US 7,411,746 B2↗2008Assignee: Hoya Corporation
Inventors: Koji Kato, Masakazu Saori
PENTAX DA 21mm f/3.2 AL Limited— 8 elements / 5 groups, f = 21.60 mm design; 21 mm nominal
US 7,715,118 B2↗2010Assignee: Hoya Corporation
Inventors: Koji Kato
PENTAX DA 35mm f/2.8 Macro Limited— 9 elements / 8 groups, 35 mm marketed; 34.41 mm patent EFL
Pentax Ricoh Imaging Company, Ltd.(1)US 8,824,059 B2↗2014Assignee: Pentax Ricoh Imaging Company, Ltd.
Inventors: Koji Kato, Masakazu Saori
PENTAX-02 STANDARD ZOOM 5-15mm f/2.8-4.5— 8 ELEMENTS / 7 PHYSICAL GROUPS, MARKETED 5-15mm f/2.8-4.5