OW

Otsuro Wakamatsu

SC Shimizu Construction Co.: 1 patents #112 of 352Top 35%
Overall (All Time): #3,934,239 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4853495 Electronic blackboard and electronic blackboard system Tomonori Ouchi, Hiroshi KAWANISHI, Masao Yasui 1989-08-01