Inventor · disambiguated record
Keiji Izumi
Also filed as: IZUMI KEIJI
16 granted patents·2 pending applications·127 citations·filing 1991–2017
92Inventor score
Files withNISSHIN STEEL CO LTD10NIPPON STEEL NISSHIN CO LTD2OLYMPUS OPTICAL CO2AYA IZUMI1OLYMPUS CORP1
Top patents by PatentIndex Score
18 records- 0191US10233645B2Metal roofing member, and roofing structure and roofing method using sameNISSHIN STEEL CO LTD·Filed 2015·Granted Mar 19, 2019·6 cites·15 claims
- 0290US6568784B2Image recording apparatusOLYMPUS OPTICAL CO·Filed 2002·Granted May 27, 2003·44 cites·19 claims
- 0381US11261603B2Metallic roof material and roofing method using sameNIPPON STEEL NISSHIN CO LTD·Filed 2017·Granted Mar 1, 2022·6 cites·8 claims
- 0478US6561615B2Image forming apparatusOLYMPUS OPTICAL CO·Filed 2002·Granted May 13, 2003·20 cites·17 claims
- 0568US10597874B2Metal roofing material, and roofing structure and roofing method using sameNISSHIN STEEL CO LTD·Filed 2016·Granted Mar 24, 2020·3 cites·18 claims
- 0666US7070877B2Stainless steel separator for low-temperature fuel cellTOYOTA MOTOR CO LTD·Filed 2003·Granted Jul 4, 2006·4 cites·3 claims
- 0764US7879508B2Separator for low-temperature type fuel cell and production method thereforNISSHIN STEEL CO LTD·Filed 2009·Granted Feb 1, 2011·1 cites·2 claims
- 0861US6905041B1Fuel tank made from aluminum coated steel sheetNISSHIN STEEL CO LTD·Filed 1999·Granted Jun 14, 2005·19 cites·6 claims
- 0959US7008052B2Ink jet printerOLYMPUS CORP·Filed 2004·Granted Mar 7, 2006·7 cites·21 claims
- 1058US2011180141A1Dye-sensitized solar cellNISSHIN STEEL CO LTD·Filed 2009·Application pending·0 cites
- 1156US10519661B2Metal roofing materialNISSHIN STEEL CO LTD·Filed 2016·Granted Dec 31, 2019·1 cites·17 claims
- 1255US6544666B2Chemically processed steel sheet improved in corrosion resistanceNISSHIN STEEL CO LTD·Filed 2001·Granted Apr 8, 2003·3 cites·11 claims
- 1349US2008169747A1Display device using light storage material and method of manufacturing the sameAYA IZUMI·Filed 2007·Application pending·0 cites
- 1447US5267044AAutomatic focusing system for use in cameras having zooming functionTOSHIBA KK·Filed 1991·Granted Nov 30, 1993·13 cites·13 claims
- 1542US7608119B2Separator for low-temperature type fuel cell and production method thereforNISSHIN STEEL CO LTD·Filed 2001·Granted Oct 27, 2009·0 cites·3 claims
- 1638US10400455B2Metal roofing member, production method thereof, roofing structure and roofing methodNIPPON STEEL NISSHIN CO LTD·Filed 2015·Granted Sep 3, 2019·0 cites·9 claims
- 1737US10724242B2Metal roofing material and roofing methodNISSHIN STEEL CO LTD·Filed 2016·Granted Jul 28, 2020·0 cites·13 claims
- 1828USD841192SRoof boardNISSHIN STEEL CO LTD·Filed 2016·Granted Feb 19, 2019·0 cites·1 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →