Inventor
KUBOTA TOMOHIRO
JP90 patents
⚠️ This page may combine multiple inventors who share the name “KUBOTA TOMOHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KUBOTA TOMOHIRO
12 patentsUS8744321B2Jun 3, 2014
Developer container, developing device, process unit, and image forming apparatus
KUBOTA TOMOHIRO17 citations92
US10175607B2Jan 8, 2019
Developer container including a convex portion, a rotator, and a recess
KUBOTA TOMOHIRO4 citations84
US8792808B2Jul 29, 2014
Developer container, developing device, process unit, and image forming apparatus
KUBOTA TOMOHIRO7 citations84
USD723099SFeb 24, 2015
Powder container
KUBOTA TOMOHIRO6 citations83
US8571426B2Oct 29, 2013
Toner supply method, development device, process unit, and image forming apparatus
KUBOTA TOMOHIRO8 citations83
US10496013B2Dec 3, 2019
Developing device, process cartridge, and image forming apparatus
KUBOTA TOMOHIRO2 citations73
US8861991B2Oct 14, 2014
Developer amount detector, and developer container, development device, and image forming apparatus incorporating same
KUBOTA TOMOHIRO4 citations73
US8260186B2Sep 4, 2012
Toner cartridge with refillable fresh and residual toner chambers, process cartridge, and method of making toner cartridge reusable
KUBOTA TOMOHIRO6 citations73
USD724655SMar 17, 2015
Powder container
KUBOTA TOMOHIRO4 citations72
US8774683B2Jul 8, 2014
Development device, developer container, and image forming apparatus
KUBOTA TOMOHIRO2 citations63
US8442414B2May 14, 2013
Seal member, developing device, process cartridge, and image forming apparatus
KUBOTA TOMOHIRO3 citations63
US8081897B2Dec 20, 2011
Seal member, developing device, process cartridge, and image forming apparatus
KUBOTA TOMOHIRO2 citations63
RICOH CO LTD
10 patentsUS8019254B2Sep 13, 2011
Toner conveying device, process cartridge, and image forming apparatus
RICOH CO LTD32 citations93
US7979013B2Jul 12, 2011
Developing device of image forming apparatus
RICOH CO LTD13 citations84
US7965957B2Jun 21, 2011
Developing device and image forming apparatus that uses this developing device
RICOH CO LTD13 citations84
US7965958B2Jun 21, 2011
Developing device, process cartridge and image forming apparatus
RICOH CO LTD7 citations84
US7945203B2May 17, 2011
Waste-toner collecting device, process cartridge, and image forming apparatus
RICOH CO LTD13 citations84
US7917077B2Mar 29, 2011
Waste-toner housing device, and image forming apparatus
RICOH CO LTD7 citations84
US7890044B2Feb 15, 2011
Powder conveyance device, toner conveyance device, process cartridge and image forming apparatus
RICOH CO LTD13 citations84
US7873302B2Jan 18, 2011
Cleaning device and image forming apparatus
RICOH CO LTD7 citations84
US11506994B2Nov 22, 2022
Toner cartridge including a protrusion protruding from a center of a conveyance drive gear
RICOH CO LTD0 citations62
US11231663B2Jan 25, 2022
Toner cartridge including a protrusion protruding from a center of a conveyance drive gear
RICOH CO LTD0 citations62
SEMICONDUCTOR ENERGY LAB
9 patentsUS12139446B2Nov 12, 2024
Arylamine compound, hole-transport layer material, hole-injection layer material, light-emitting device, light-emitting apparatus, electronic apparatus, and lighting device
SEMICONDUCTOR ENERGY LAB2 citations71
US12460130B2Nov 4, 2025
Organic compound, light-emitting device, light-emitting apparatus, electronic equipment, lighting device, and electronic device
SEMICONDUCTOR ENERGY LAB0 citations63
US12419155B2Sep 16, 2025
Hole-transport layer material, electron-blocking layer material, electron-transport layer material, hole-blocking layer material, light-emitting device, light-emitting apparatus, electronic device, and lighting device
SEMICONDUCTOR ENERGY LAB1 citations63
US11964928B2Apr 23, 2024
Organic compound, light-emitting device, light-emitting apparatus, electronic equipment, lighting device, and electronic device
SEMICONDUCTOR ENERGY LAB0 citations63
US9159934B2Oct 13, 2015
Organic material, light-emitting element, light-emitting device, electronic appliance, and lighting device
SEMICONDUCTOR ENERGY LAB2 citations63
US12356791B2Jul 8, 2025
Light-emitting device, electronic device, and lighting device
SEMICONDUCTOR ENERGY LAB0 citations62
US11800734B2Oct 24, 2023
Light-emitting device, electronic device, and lighting device
SEMICONDUCTOR ENERGY LAB0 citations62
US11482687B2Oct 25, 2022
Light-emitting device, electronic device, and lighting device
SEMICONDUCTOR ENERGY LAB0 citations62
US10636976B2Apr 28, 2020
Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device
SEMICONDUCTOR ENERGY LAB1 citations62
RICOH KK
8 patentsUS7424263B2Sep 9, 2008
Toner recovery belt conveyor, process cartridge, and image forming apparatus using the same
RICOH KK23 citations93
USD597129SJul 28, 2009
Process cartridge for image forming apparatus
RICOH KK15 citations84
USD590012SApr 7, 2009
Process cartridge for image forming apparatus
RICOH KK10 citations84
USD580968SNov 18, 2008
Process cartridge for image forming apparatus
RICOH KK9 citations84
USD603450SNov 3, 2009
Process cartridge for image forming apparatus
RICOH KK6 citations74
USD590011SApr 7, 2009
Process cartridge for image forming apparatus
RICOH KK7 citations74
US7706724B2Apr 27, 2010
Charging-roller bearing member, process cartridge, and image forming apparatus
RICOH KK6 citations63
US7623821B2Nov 24, 2009
Conveyor device, process cartridge, image forming apparatus, and method of forming image
RICOH KK5 citations63
ASM IP HOLDING BV
4 patentsUS10290508B1May 14, 2019
Method for forming vertical spacers for spacer-defined patterning
ASM IP HOLDING BV414 citations98
US10381219B1Aug 13, 2019
Methods for forming a silicon nitride film
ASM IP HOLDING BV17 citations82
US10811256B2Oct 20, 2020
Method for etching a carbon-containing feature
ASM IP HOLDING BV3 citations72
US12550644B2Feb 10, 2026
Method and system for forming silicon nitride on a sidewall of a feature
ASM IP HOLDING BV0 citations62
SHIMIZU YOSHIYUKI
3 patentsUS8135329B2Mar 13, 2012
Toner conveyer device, process cartridge, and image forming apparatus
SHIMIZU YOSHIYUKI23 citations92
US8160476B2Apr 17, 2012
Latent image carrier having pairs of first and second positioning protrusions and image forming apparatus
SHIMIZU YOSHIYUKI12 citations84
US9069284B2Jun 30, 2015
Image forming apparatus and powder transport unit
SHIMIZU YOSHIYUKI7 citations83
TSURITANI SHOH
2 patentsUS9201341B2Dec 1, 2015
Developer container, developing device, processing unit, image forming device, and method of manufacturing developer container
TSURITANI SHOH8 citations83
US9141028B2Sep 22, 2015
Image forming apparatus and developer container, developing device, process unit, and replaceable unit therefor
TSURITANI SHOH3 citations62
KAWAKAMI YOSHIHIRO
1 patentHAMADA MANABU
1 patentShowing the top 50 of 90 patents by PatentIndex Score.