TT

Tsunefumi Tanaka

Canon: 5 patents #89 of 1,247Top 8%
Overall (1989): #2,037 of 140,708Top 2%
5
Patents 1989

Issued Patents 1989

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
4865434 Zoom lens capable of selecting a focal length beyond a standard focal length range Takashi Matsushita, Sadatoshi Takahashi, Nozomu Kitagishi, Keiji Ikemori 1989-09-12
4861147 Zoom lens system 1989-08-29
4842385 Zoom lens 1989-06-27
4840468 Focusing method for zoom lens 1989-06-20
4830477 Zoom lens capable of obtaining focal lengths beyond a variable focal length range Sadatoshi Takahashi, Keiji Ikemori, Nozomu Kitagishi, Takashi Matsushita, Kikuo Momiyama 1989-05-16