Assignee
YAMAMOTO SHUZO
3 patents
Top patents by PatentIndex Score
US4462596AJul 31, 1984
Piece-stacking game device utilizing magnetic forces
YAMAMOTO SHUZO63 citations92
US8330874B2Dec 11, 2012
Video signal conversion device, video signal conversion method and video display device
YAMAMOTO SHUZO8 citations80
US4430824AFeb 14, 1984
Composite-picture forming play kit
YAMAMOTO SHUZO9 citations69