Inventor
OGAWA TADAYOSHI
JP4 patents
Patents
4 patentsUS5486925AJan 23, 1996
Displacement sensing apparatus for a movable member
ROHM CO LTD12 citations71
US5666574ASep 9, 1997
Photo-detection methods and apparatus
ROHM CO LTD15 citations69
US6198146B1Mar 6, 2001
Photo detective unit and electric apparatus using the same
ROHM CO LTD2 citations61
US5811867ASep 22, 1998
Photo detective unit and electric apparatus using the same
ROHM CO LTD3 citations61