Inventor · disambiguated record
Harumi Ishiyama
Also filed as: ISHIYAMA HARUMI
41 granted patents·1 pending application·608 citations·filing 1995–2006
98Inventor score
Files withCANON KK42
Top patents by PatentIndex Score
42 records- 0195US6128456AImage forming apparatus having a charging member applying an electric charge through electrically conductive or electroconductive particles to the surface of a photosensitive or image bearing memberCANON KK·Filed 1998·Granted Oct 3, 2000·76 cites·33 claims
- 0284US6134407ACharging apparatus for charging a moving member to be charged including an elastic rotatable member carrying electroconductive particles on the surface thereofCANON KK·Filed 1998·Granted Oct 17, 2000·29 cites·13 claims
- 0381US6442362B2Image forming apparatus for making recovery and restoration of toners by electrical conductive memberCANON KK·Filed 2000·Granted Aug 27, 2002·19 cites·21 claims
- 0479US6289190B1Electrophotographic apparatus and process cartridgeCANON KK·Filed 1999·Granted Sep 11, 2001·27 cites·56 claims
- 0578US6549742B1Charging apparatus employing charging particles, and image forming apparatus employing such a charging apparatusCANON KK·Filed 2001·Granted Apr 15, 2003·16 cites·24 claims
- 0678US6301459B1Charging apparatus with first and second charging membersCANON KK·Filed 2000·Granted Oct 9, 2001·13 cites·34 claims
- 0775US6226480B1Image forming apparatus supplying charging accelerating particles to image bearing body in non-image formingCANON KK·Filed 1999·Granted May 1, 2001·23 cites·13 claims
- 0872US5708932ACharging system and electrophotography apparatusCANON KK·Filed 1997·Granted Jan 13, 1998·21 cites·23 claims
- 0971US6212346B1Charging member for holding electrically conductive particles in cellsCANON KK·Filed 1999·Granted Apr 3, 2001·20 cites·8 claims
- 1070US6904253B2Charging member having an elastic foam member including cell portions whose gap ratio is 5% to 50%, charging apparatus, process cartridge, and image forming apparatus having such charging memberCANON KK·Filed 2002·Granted Jun 7, 2005·11 cites·29 claims
- 1170US6081681ACharging device, charging method, process cartridge and image forming apparatusCANON KK·Filed 1998·Granted Jun 27, 2000·38 cites·51 claims
- 1270US6038420ACharging device, charging method and image forming apparatusCANON KK·Filed 1998·Granted Mar 14, 2000·19 cites·9 claims
- 1370US6002900AImage forming method, image forming apparatus and process cartridgeCANON KK·Filed 1998·Granted Dec 14, 1999·20 cites·72 claims
- 1468US6301455B1Charging member, charging device and image forming apparatus wherein deposition of magnetic particles to a member to be charged is effectively preventedCANON KK·Filed 2000·Granted Oct 9, 2001·8 cites·11 claims
- 1566US6615010B2Electrifier for charging developer carrying member using charge particles, including charge rotary member and nip forming member having bias polarity the same as developer polarityCANON KK·Filed 2001·Granted Sep 2, 2003·9 cites·30 claims
- 1666US6553199B2Charging device, process cartridge and image forming apparatusCANON KK·Filed 2001·Granted Apr 22, 2003·9 cites·37 claims
- 1766US6298205B1Charging apparatus which stores electrically conductive particles in granule formCANON KK·Filed 1999·Granted Oct 2, 2001·16 cites·6 claims
- 1866US6061539ACharging member, charging device and image forming apparatusCANON KK·Filed 1995·Granted May 9, 2000·13 cites·37 claims
- 1966US6038418ACharging method and a charging device for charging a member to be charged by a flexible charging memberCANON KK·Filed 1998·Granted Mar 14, 2000·16 cites·29 claims
- 2065US6272301B1Image forming apparatus featuring a rotatable electroconductive foam memberCANON KK·Filed 1999·Granted Aug 7, 2001·16 cites·9 claims
- 2165US5659852AImage forming method, image forming apparatus and process cartridgeCANON KK·Filed 1996·Granted Aug 19, 1997·17 cites·223 claims
- 2264US6519433B1Image forming apparatus in which electroconductive particles are supplied to charging means from developing device by way of image bearing memberCANON KK·Filed 2000·Granted Feb 11, 2003·9 cites·10 claims
- 2364US6163671AContact charger having charging performance enhancing particles existing at a contact portion between the contact charger and the member to be chargedCANON KK·Filed 1999·Granted Dec 19, 2000·15 cites·12 claims
- 2464US5822659AImage forming apparatus and process cartridge detachably mountable relative to an image forming apparatusCANON KK·Filed 1997·Granted Oct 13, 1998·16 cites·16 claims
- 2564US5579095ACharging deviceCANON KK·Filed 1995·Granted Nov 26, 1996·16 cites·30 claims
- 2663US6580889B1Image forming apparatus having a member to be charged, injection charging means having an elastic member for press-contacting the member to be charged, and electroconductive particles between the elastic member and the member to be chargedCANON KK·Filed 2000·Granted Jun 17, 2003·7 cites·18 claims
- 2762US7116922B2Charging apparatusCANON KK·Filed 2004·Granted Oct 3, 2006·6 cites·54 claims
- 2862US5729802AContact charger for charging a photosensitive memberCANON KK·Filed 1996·Granted Mar 17, 1998·15 cites·8 claims
- 2961US6173144B1Image forming apparatus which supplies image bearing member with electrically conductive particles during developmentCANON KK·Filed 1999·Granted Jan 9, 2001·14 cites·11 claims
- 3060US6466758B2Developing apparatus having foreign matter accumulating spaceCANON KK·Filed 2001·Granted Oct 15, 2002·7 cites·8 claims
- 3160US6233419B1Charging device and image forming apparatusCANON KK·Filed 1998·Granted May 15, 2001·13 cites·25 claims
- 3259US6118965AImage forming apparatus having a contact-type chargerCANON KK·Filed 1998·Granted Sep 12, 2000·13 cites·33 claims
- 3355US5666192ACharging member and image forming apparatusCANON KK·Filed 1995·Granted Sep 9, 1997·11 cites·24 claims
- 3449US7424232B2Charging apparatusCANON KK·Filed 2006·Granted Sep 9, 2008·0 cites·15 claims
- 3549US6389254B2Charging member holding charge accelerating particles in a continuous bubbleCANON KK·Filed 1999·Granted May 14, 2002·8 cites·12 claims
- 3648US5754927AMagnetic charging brush having particular magnetic fieldsCANON KK·Filed 1996·Granted May 19, 1998·8 cites·19 claims
- 3746US5930566AElectrostatic charging apparatus having conductive particles with a multi-peaked size distributionCANON KK·Filed 1997·Granted Jul 27, 1999·7 cites·24 claims
- 3838US6473582B2Contact-type charging device having a plurality of projections over the surface of the charging deviceCANON KK·Filed 1998·Granted Oct 29, 2002·4 cites·43 claims
- 3935US6832062B2Charging apparatus, process cartridge and image forming apparatus having electroconductive particles charged in a nip between a charging member and a member to be chargedCANON KK·Filed 2003·Granted Dec 14, 2004·0 cites·26 claims
- 4035US6788911B2Charging apparatus, process cartridge and image forming apparatusCANON KK·Filed 2002·Granted Sep 7, 2004·0 cites·16 claims
- 4135US6157800ACharging device using a magnetic brush contactable to a member to be charged and image forming apparatus using sameCANON KK·Filed 1995·Granted Dec 5, 2000·3 cites·15 claims
- 4234US2002141783A1Image-forming apparatus and image-forming methodCANON KK·Filed 2002·Application pending·0 cites
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