Takeshi Umeda — Lens Patent Author | Surface & Stop

Takeshi Umeda5 related patents across 5 interactive lens diagrams.
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Nikon Corporation (4)
Sigma Corporation (1)
Nikon Corporation(4)US 2018/0196240 A1↗2018Assignee: Nikon Corporation
Inventors: Makoto Fujimoto, Takeshi Umeda
Example 11NIKON 1 NIKKOR VR 10-30mm f/3.5-5.6 PD-ZOOM— 9 ELEMENTS / 7 GROUPS, 10-30mm MARKETED; 10.2-29.4mm PATENT
WO 2019/049372 A1↗2019Assignee: Nikon Corporation
Inventors: Takeshi Umeda
Example 1NIKON NIKKOR Z 24-70mm f/4 S— 14 ELEMENTS / 11 GROUPS, f = 24.72 – 67.91 mm (2.75× zoom)
WO 2020/012638 A1↗2020Assignee: Nikon Corporation
Inventors: Yoko Komatsubara, Takeshi Umeda
Numerical Example 8NIKON NIKKOR Z DX 16-50mm f/3.5-6.3 VR— 9 ELEMENTS / 7 GROUPS, f = 16.46–48.50 mm
WO 2021/117563 A1↗2021Assignee: Nikon Corporation
Inventors: Fumiaki Ohtake, Azuna Nonaka, Yoshiharu Yuasa, Takeshi Umeda
Example 4NIKON NIKKOR Z 14-24mm f/2.8 S— 16 ELEMENTS / 11 GROUPS, f = 14.4–23.3 mm (patent) / 14–24 mm (production)
Sigma Corporation(1)JP 2025-182227 A↗2025Assignee: Sigma Corporation
Inventors: Takeshi Umeda
Numerical Example 1SIGMA 28-105mm f/2.8 DG DN Art— 18 ELEMENTS / 13 GROUPS, SOURCE 28.55–102.37 mm