SY

Shiyouichi Yamaka

PE Pentax: 1 patents #19 of 50Top 40%
Overall (1982): #30,861 of 81,411Top 40%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4365883 Focusing screen holding device Yukio Takaoka, Keisuke Haraguchi 1982-12-28