SK

Shigeo Koyama

MC Mita Industrial Co.: 23 patents #8 of 891Top 1%
AC Amada Co.: 4 patents #71 of 479Top 15%
📍 Toyonaka, JP: #40 of 1,166 inventorsTop 4%
Overall (All Time): #140,212 of 4,157,543Top 4%
28
Patents All Time

Issued Patents All Time

Showing 26–28 of 28 patents

Patent #TitleCo-InventorsDate
4400077 Photosensitive drum for electrostatic copying apparatus Nobuhiko Kozuka, Ryutaro Yamagata, Hiromi Sakata, Atsushi Kano 1983-08-23
4387889 Copying apparatus provided with a cassette-type paper feeding mechanism Ryutaro Yamagata, Nobuhiko Kozuka, Hiromi Sakata 1983-06-14
4259008 Electrostatic copying apparatus Ryutaro Yamagata, Sohei Matsuo, Nobuhiko Kozuka, Yasusuke Tohi, Tatsuo Aizawa 1981-03-31