Assignee
YOKOYAMA SEIJI
JP·3 granted patents·0 citations·filing 2009–2012
Top patents by PatentIndex Score
3 records- 0151US8282095B2Double-feed detection apparatus and image forming apparatusYOKOYAMA SEIJI·Filed 2009·Granted Oct 9, 2012·0 cites·16 claims
- 0248US8973919B2Double-feed detection apparatus and image forming apparatusYOKOYAMA SEIJI·Filed 2012·Granted Mar 10, 2015·0 cites·9 claims
- 0336US8440557B2Method for fabricating a semiconductor device by considering the extinction coefficient during etching of an interlayer insulating filmYOKOYAMA SEIJI·Filed 2010·Granted May 14, 2013·0 cites·12 claims
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