Inventor · disambiguated record
Kazuhiko Furukawa
Also filed as: FURUKAWA KAZUHIKO
48 granted patents·1 pending application·429 citations·filing 1994–2020
98Inventor score
Top patents by PatentIndex Score
49 records- 0194US5871296AClicking-type writing implementMITSUBISHI PENCIL CO·Filed 1996·Granted Feb 16, 1999·53 cites·9 claims
- 0293US9545813B2Ball penMITSUBISHI PENCIL CO·Filed 2013·Granted Jan 17, 2017·9 cites·8 claims
- 0390US10336129B2Writing implementMITSUBISHI PENCIL CO·Filed 2015·Granted Jul 2, 2019·4 cites·4 claims
- 0487US9889701B2Writing implementMITSUBISHI PENCIL CO·Filed 2015·Granted Feb 13, 2018·3 cites·4 claims
- 0584US6261019B1Ball point penMITSUBISHI PENCIL CO·Filed 1998·Granted Jul 17, 2001·32 cites·11 claims
- 0680US9162515B2Writing implement refill and writing implementMITSUBISHI PENCIL CO·Filed 2013·Granted Oct 20, 2015·3 cites·6 claims
- 0779US6082920ABall-point penMITSUBISHI PENCIL CO·Filed 1997·Granted Jul 4, 2000·27 cites·20 claims
- 0878US7862249B2Ball-point pen tip and ink refillMITSUBISHI PENCIL KABUSHIKIKAISHA·Filed 2007·Granted Jan 4, 2011·9 cites·6 claims
- 0974US6435747B2Double ended direct-feed type writing implementMITSUBISHI PENCIL CO·Filed 2001·Granted Aug 20, 2002·14 cites·16 claims
- 1073US6340261B1Ball-point penMITSUBISHI PENCIL CO·Filed 1998·Granted Jan 22, 2002·23 cites·6 claims
- 1172US5929135ALow-viscosity aqueous ink for a ball-point pen and a ball-point penMITSUBISHI PENCIL CO·Filed 1997·Granted Jul 27, 1999·26 cites·11 claims
- 1270US6769827B2Collector type writing implementMITSUBISHI PENCIL CO·Filed 2001·Granted Aug 3, 2004·11 cites·16 claims
- 1368US10576775B2Knock type writing instrumentMITSUBISHI PENCIL CO·Filed 2015·Granted Mar 3, 2020·1 cites·7 claims
- 1464US5655847ABall-point penMITSUBISHI PENCIL CO·Filed 1994·Granted Aug 12, 1997·22 cites·11 claims
- 1563US11649359B2Composition, coating method, and multilayer structureSHARP KK·Filed 2020·Granted May 16, 2023·0 cites·14 claims
- 1663US6302610B2Direct-feed type writing implementMITSUBISHI PENCIL CO·Filed 2000·Granted Oct 16, 2001·8 cites·29 claims
- 1761US6619870B2Collector type writing implementMITSUBISHI PENCIL CO·Filed 2000·Granted Sep 16, 2003·7 cites·4 claims
- 1861US6132124AInk follower for aqueous ballpoint pen using gel-like material and solid pieceMITSUBISHI PENCIL CO·Filed 1996·Granted Oct 17, 2000·15 cites·16 claims
- 1960US5915866AClicking-type ball point penMITSUBISHI PENCIL CO·Filed 1998·Granted Jun 29, 1999·15 cites·8 claims
- 2060US5521383ACorona discharge deviceSHARP KK·Filed 1994·Granted May 28, 1996·23 cites·12 claims
- 2159US5915871ABall-point pen capMITSUBISHI PENCIL CO·Filed 1997·Granted Jun 29, 1999·12 cites·1 claims
- 2258US6619871B2Collector type writing instrumentMITSUBISHI PENCIL CO·Filed 2000·Granted Sep 16, 2003·6 cites·13 claims
- 2358US5876142ABall-point penMITSUBISHI PENCIL CO·Filed 1997·Granted Mar 2, 1999·14 cites·8 claims
- 2457US6340259B2Direct-feed type writing implementMITSUBISHI PENCIL CO·Filed 2000·Granted Jan 22, 2002·6 cites·22 claims
- 2556US6622000B2Developing apparatus having a charge amount control memberSHARP KK·Filed 2001·Granted Sep 16, 2003·6 cites·12 claims
- 2655US10507684B2Writing instrumentMITSUBISHI PENCIL CO·Filed 2016·Granted Dec 17, 2019·0 cites·7 claims
- 2755US5709493ABallpoint pen having a backflow preventing mechanismMITSUBISHI PENCIL CO·Filed 1996·Granted Jan 20, 1998·12 cites·9 claims
- 2854US6275666B1Developing device and image formation apparatusSHARP KK·Filed 2000·Granted Aug 14, 2001·5 cites·21 claims
- 2953US6966718B2Writing instrument, writing instrument cap and method of assembly of a writing instrument capMITSUBISHI PENCIL CO·Filed 2002·Granted Nov 22, 2005·4 cites·13 claims
- 3053US5867760ATransfer device with an anisotropin conductive layerSHARP KK·Filed 1997·Granted Feb 2, 1999·10 cites·22 claims
- 3152US6602012B2Collector type writing instrumentMITSUBISHI PENCIL CO·Filed 2000·Granted Aug 5, 2003·4 cites·11 claims
- 3252US6588963B2Collector type writing instrumentMITSUBISHI PENCIL CO·Filed 2000·Granted Jul 8, 2003·4 cites·4 claims
- 3351US7303351B2Writing instrument and welding method of writing point assembly and writing instrument parts connecting structure and connecting methodMITSUBISHI PENCIL CO·Filed 2003·Granted Dec 4, 2007·2 cites·3 claims
- 3451US6398442B1Writing instrumentMITSUBISHI PENCIL CO·Filed 1999·Granted Jun 4, 2002·9 cites·8 claims
- 3548US6161977APoint assembly of a ball-point penMITSUBISHI PENCIL CO·Filed 1998·Granted Dec 19, 2000·9 cites·1 claims
- 3647US6974272B2Writing instrument capMITSUBISHI PENCIL CO·Filed 2002·Granted Dec 13, 2005·2 cites·8 claims
- 3746US2009165261A1Clip for a Writing ImplementMITSUBISHI PENCIL CO·Filed 2006·Application pending·0 cites
- 3845US7223037B2Production processes for writing instrument and ink occlusion bodyMITSUBISHI PENCIL CO·Filed 2002·Granted May 29, 2007·1 cites·6 claims
- 3945US6873813B2Development method and image formation apparatusSHARP KK·Filed 2003·Granted Mar 29, 2005·2 cites·1 claims
- 4042US10576774B2Ballpoint penMITSUBISHI PENCIL CO·Filed 2016·Granted Mar 3, 2020·0 cites·7 claims
- 4141US11467677B2Input pen and method of manufacturing input penMITSUBISHI PENCIL CO·Filed 2019·Granted Oct 11, 2022·0 cites·9 claims
- 4241US5711626ABall-point pen with back flow stopMITSUBISHI PENCIL CO·Filed 1994·Granted Jan 27, 1998·7 cites·13 claims
- 4340US7325992B2Gas-pressurized writing instrument and writing instrument refillMITSUBISHI PENCIL CO·Filed 2003·Granted Feb 5, 2008·0 cites·11 claims
- 4439US7381004B2Gas pressurized writing instrument and writing instrument refillMITSUBISHI PENCIL CO·Filed 2003·Granted Jun 3, 2008·0 cites·4 claims
- 4539US6364462B1Image recording method and image recording apparatus permitting good picture quality to be providedSHARP KK·Filed 1999·Granted Apr 2, 2002·5 cites·15 claims
- 4638US6382862B2Application liquid reservoirMITSUBISHI PENCIL CO·Filed 2001·Granted May 7, 2002·0 cites·9 claims
- 4737US6681091B2Development method and image formation apparatusSHARP KK·Filed 2002·Granted Jan 20, 2004·0 cites·14 claims
- 4836US6371676B1Collector for a writing implementMITSUBISHI PENCIL CO·Filed 1999·Granted Apr 16, 2002·4 cites·9 claims
- 4934US8162554B2Writing implementFURUKAWA KAZUHIKO·Filed 2007·Granted Apr 24, 2012·0 cites·3 claims
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