Inventor
FURUKAWA KAZUHIKO
JP48 patents
⚠️ This page may combine multiple inventors who share the name “FURUKAWA KAZUHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI PENCIL CO
38 patentsUS5655847AAug 12, 1997
Ball-point pen
MITSUBISHI PENCIL CO22 citations93
US6340261B1Jan 22, 2002
Ball-point pen
MITSUBISHI PENCIL CO23 citations92
US6261019B1Jul 17, 2001
Ball point pen
MITSUBISHI PENCIL CO32 citations92
US6082920AJul 4, 2000
Ball-point pen
MITSUBISHI PENCIL CO27 citations92
US5871296AFeb 16, 1999
Clicking-type writing implement
MITSUBISHI PENCIL CO53 citations92
US5929135AJul 27, 1999
Low-viscosity aqueous ink for a ball-point pen and a ball-point pen
MITSUBISHI PENCIL CO26 citations86
US9545813B2Jan 17, 2017
Ball pen
MITSUBISHI PENCIL CO9 citations83
US6435747B2Aug 20, 2002
Double ended direct-feed type writing implement
MITSUBISHI PENCIL CO14 citations83
US6398442B1Jun 4, 2002
Writing instrument
MITSUBISHI PENCIL CO9 citations74
US6161977ADec 19, 2000
Point assembly of a ball-point pen
MITSUBISHI PENCIL CO9 citations74
US5915866AJun 29, 1999
Clicking-type ball point pen
MITSUBISHI PENCIL CO15 citations74
US5876142AMar 2, 1999
Ball-point pen
MITSUBISHI PENCIL CO14 citations74
US5709493AJan 20, 1998
Ballpoint pen having a backflow preventing mechanism
MITSUBISHI PENCIL CO12 citations74
US6769827B2Aug 3, 2004
Collector type writing implement
MITSUBISHI PENCIL CO11 citations73
US6619870B2Sep 16, 2003
Collector type writing implement
MITSUBISHI PENCIL CO7 citations73
US6132124AOct 17, 2000
Ink follower for aqueous ballpoint pen using gel-like material and solid piece
MITSUBISHI PENCIL CO15 citations73
US5915871AJun 29, 1999
Ball-point pen cap
MITSUBISHI PENCIL CO12 citations73
US5711626AJan 27, 1998
Ball-point pen with back flow stop
MITSUBISHI PENCIL CO7 citations73
US10336129B2Jul 2, 2019
Writing implement
MITSUBISHI PENCIL CO4 citations72
US9889701B2Feb 13, 2018
Writing implement
MITSUBISHI PENCIL CO3 citations72
US6302610B2Oct 16, 2001
Direct-feed type writing implement
MITSUBISHI PENCIL CO8 citations71
US9162515B2Oct 20, 2015
Writing implement refill and writing implement
MITSUBISHI PENCIL CO3 citations62
US6974272B2Dec 13, 2005
Writing instrument cap
MITSUBISHI PENCIL CO2 citations62
US6966718B2Nov 22, 2005
Writing instrument, writing instrument cap and method of assembly of a writing instrument cap
MITSUBISHI PENCIL CO4 citations62
US6619871B2Sep 16, 2003
Collector type writing instrument
MITSUBISHI PENCIL CO6 citations62
US6602012B2Aug 5, 2003
Collector type writing instrument
MITSUBISHI PENCIL CO4 citations62
US6588963B2Jul 8, 2003
Collector type writing instrument
MITSUBISHI PENCIL CO4 citations62
US6371676B1Apr 16, 2002
Collector for a writing implement
MITSUBISHI PENCIL CO4 citations62
US6340259B2Jan 22, 2002
Direct-feed type writing implement
MITSUBISHI PENCIL CO6 citations60
US10576775B2Mar 3, 2020
Knock type writing instrument
MITSUBISHI PENCIL CO1 citations58
US7303351B2Dec 4, 2007
Writing instrument and welding method of writing point assembly and writing instrument parts connecting structure and connecting method
MITSUBISHI PENCIL CO2 citations57
US10507684B2Dec 17, 2019
Writing instrument
MITSUBISHI PENCIL CO0 citations51
US7325992B2Feb 5, 2008
Gas-pressurized writing instrument and writing instrument refill
MITSUBISHI PENCIL CO0 citations51
US7223037B2May 29, 2007
Production processes for writing instrument and ink occlusion body
MITSUBISHI PENCIL CO1 citations51
US6382862B2May 7, 2002
Application liquid reservoir
MITSUBISHI PENCIL CO0 citations51
US11467677B2Oct 11, 2022
Input pen and method of manufacturing input pen
MITSUBISHI PENCIL CO0 citations42
US7381004B2Jun 3, 2008
Gas pressurized writing instrument and writing instrument refill
MITSUBISHI PENCIL CO0 citations41
US10576774B2Mar 3, 2020
Ballpoint pen
MITSUBISHI PENCIL CO0 citations37
SHARP KK
8 patentsUS5521383AMay 28, 1996
Corona discharge device
SHARP KK23 citations91
US5867760AFeb 2, 1999
Transfer device with an anisotropin conductive layer
SHARP KK10 citations74
US6873813B2Mar 29, 2005
Development method and image formation apparatus
SHARP KK2 citations63
US6622000B2Sep 16, 2003
Developing apparatus having a charge amount control member
SHARP KK6 citations63
US6275666B1Aug 14, 2001
Developing device and image formation apparatus
SHARP KK5 citations63
US6364462B1Apr 2, 2002
Image recording method and image recording apparatus permitting good picture quality to be provided
SHARP KK5 citations62
US11649359B2May 16, 2023
Composition, coating method, and multilayer structure
SHARP KK0 citations60
US6681091B2Jan 20, 2004
Development method and image formation apparatus
SHARP KK0 citations52