Inventor
KOYAMA TETSU
JP34 patents
⚠️ This page may combine multiple inventors who share the name “KOYAMA TETSU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OKI DATA KK
23 patentsUS7187876B2Mar 6, 2007
Image forming apparatus with mechanism to control toner replenishment
OKI DATA KK52 citations92
US7522851B2Apr 21, 2009
Developing device
OKI DATA KK9 citations84
US6934490B2Aug 23, 2005
Toner container, print process cartridge and image forming apparatus
OKI DATA KK15 citations84
USD546873SJul 17, 2007
Toner cartridge
OKI DATA KK14 citations83
US6560430B2May 6, 2003
Developing unit having an opening allowing toner to fall directly onto a developing member and supplying member contact area
OKI DATA KK13 citations82
US7400837B2Jul 15, 2008
Image recording apparatus
OKI DATA KK7 citations74
USD501020SJan 18, 2005
Image drum cartridge
OKI DATA KK7 citations74
USD491602SJun 15, 2004
Toner cartridge
OKI DATA KK11 citations74
US9448530B1Sep 20, 2016
Developer storage body, image forming unit and image forming apparatus
OKI DATA KK5 citations73
USD529076SSep 26, 2006
Image drum cartridge
OKI DATA KK8 citations73
USD967891SOct 25, 2022
Toner cartridge
OKI DATA KK2 citations71
US7437105B2Oct 14, 2008
Developing device and image forming apparatus
OKI DATA KK2 citations63
US7313356B2Dec 25, 2007
Image forming apparatus
OKI DATA KK6 citations63
US10466619B2Nov 5, 2019
Replaceable unit, developing unit, image forming unit, and image forming apparatus
OKI DATA KK1 citations62
US6711371B2Mar 23, 2004
Developing device having means to remove developer from a developer supplying member
OKI DATA KK4 citations61
US9152125B2Oct 6, 2015
Image forming unit and image forming apparatus that incorporates the image forming unit
OKI DATA KK1 citations52
US8983342B2Mar 17, 2015
Developer storage container, image forming unit and image forming apparatus
OKI DATA KK1 citations52
US7957682B2Jun 7, 2011
Image forming unit and image forming apparatus
OKI DATA KK1 citations52
US7917059B2Mar 29, 2011
Developing device and image forming apparatus
OKI DATA KK0 citations42
US10606208B2Mar 31, 2020
Developer container, image formation unit, and image formation apparatus
OKI DATA KK0 citations41
US10274866B2Apr 30, 2019
Toner container, image forming unit including the toner container, and image forming apparatus including the toner container
OKI DATA KK0 citations41
US9223249B2Dec 29, 2015
Image forming unit and image forming apparatus
OKI DATA KK0 citations40
US9217952B2Dec 22, 2015
Image forming unit and image forming apparatus
OKI DATA KK0 citations40
NEC CORP
5 patentsUS5353279AOct 4, 1994
Echo canceler
NEC CORP54 citations92
US5388092AFeb 7, 1995
Echo canceller for two-wire full duplex digital data transmission
NEC CORP103 citations91
US4984250AJan 8, 1991
DC termination circuit for subscriber cables
NEC CORP19 citations82
US4700364AOct 13, 1987
FSK with continuous phase and continuous slope at bit transitions
NEC CORP11 citations72
US5249179ASep 28, 1993
Echo canceller system suitable for a 2B1Q transmission code
NEC CORP3 citations63