Inventor
KUMAGAI YUJI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “KUMAGAI YUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SHARP KK
4 patentsUS7660547B2Feb 9, 2010
Charging device
SHARP KK4 citations62
US7526217B2Apr 28, 2009
Image forming apparatus and waste toner warning method
SHARP KK4 citations62
US7957688B2Jun 7, 2011
Image forming method and image forming apparatus
SHARP KK5 citations61
US9658588B2May 23, 2017
Image forming apparatus, image adjustment method for the image forming apparatus, and adjustment pattern image
SHARP KK0 citations41
HITACHI LTD
2 patentsMATSUSHITA ELECTRIC WORKS LTD
2 patentsUS7339329B2Mar 4, 2008
Dimmable ballast for an electrodeless discharge lamp
MATSUSHITA ELECTRIC WORKS LTD14 citations83
US5945785AAug 31, 1999
Power source device with minimized variation in circuit efficiency due to variation in applied voltage to driving transformer
MATSUSHITA ELECTRIC WORKS LTD8 citations72