Inventor
Tomohiro Kubota
Inventor
Osaka, JP
Overview
Patents· 72 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Gprimary
G03GElectrography50%
H01LSemiconductor devices10%
LOC169%
H10KOrganic electric solid-state devices5%
C07DHeterocyclic compounds4%
C09KMaterials for miscellaneous applications, not provided for elsewhere4%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h104%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium2%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices2%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h102%
PatentTitleYear
10,816,914Developer container for image forming apparatus202010,811,256Method for etching a carbon-containing feature2020D0893308Container202010,658,181Method of spacer-defined direct patterning in semiconductor fabrication202010,636,976Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device202010,558,145Downsized developer container with higher degree of freedom202010,496,013Developing device, process cartridge, and image forming apparatus201910,381,219Methods for forming a silicon nitride film201910,295,933Developer container, developing device, process unit, and image forming apparatus201910,290,508Method for forming vertical spacers for spacer-defined patterning201910,175,607Developer container including a convex portion, a rotator, and a recess20199,804,198'Alloy material, contact probe, and connection terminal'20179,696,657'Developer container, developing device, process unit, and image forming apparatus'20179,695,158'Dibenzo[f,h]quinoxaline derivative, method of synthesizing the same, light-emitting element, light-emitting device, electronic appliance, and lighting device'20179,658,574'Powder container, developing device, process unit, and image forming apparatus'20179,586,909'Compound of synthetic intermediate'20179,366,996'Sealing structure, developing device, cleaning device, process unit, and image forming apparatus'20169,335,663'Seal, cleaning unit with seal, transfer unit with seal, developing unit with seal, process cartridge with seal, image forming apparatus with seal, and image forming method'20169,280,130'Developer container, developing device, process unit, and image forming apparatus'20169,239,565'Powder container, developing unit, process unit, and image forming apparatus incorporating same'20169,231,217'Synthesis method of organometallic complex, synthesis method of pyrazine derivative, 5,6-diaryl-2-pyrazyl triflate, light-emitting element, light-emitting device, electronic device, and lighting device'20169,201,341'Developer container, developing device, processing unit, image forming device, and method of manufacturing developer container'20159,176,419'Developer container, developing device, process unit, and image forming apparatus'20159,159,934'Organic material, light-emitting element, light-emitting device, electronic appliance, and lighting device'20159,141,028'Image forming apparatus and developer container, developing device, process unit, and replaceable unit therefor'20159,069,284'Image forming apparatus and powder transport unit'20159,042,745'Developer amount detector, image forming apparatus incorporating same, and positioning structure for positioning unit within image forming apparatus'2015D0724655'Powder container'2015D0723099'Powder container'20158,903,283'Shutter assembly, powder container, cleaning device, and image forming apparatus'20148,892,007'Image forming apparatus, toner supplying method, and computer program product'20148,861,991'Developer amount detector, and developer container, development device, and image forming apparatus incorporating same'2014D0712463'Powder container'20148,811,859'Developer container, development device, process unit, and image forming apparatus'20148,805,222'Image developing device, process cartridge including image developing device, and image forming device including image developing device'20148,805,214'Image forming apparatus'20148,792,808'Developer container, developing device, process unit, and image forming apparatus'20148,774,683'Development device, developer container, and image forming apparatus'20148,768,203'Image forming apparatus capable of effectively utilizing interior space'20148,744,321'Developer container, developing device, process unit, and image forming apparatus'20148,706,010'Image forming apparatus using a toner container in which the toner outlet may be positioned in a horizontal or vertical direction'2014D0698387'Powder container'20148,594,519'Image forming apparatus and toner supply method'20138,571,426'Toner supply method, development device, process unit, and image forming apparatus'20138,503,892'Developing unit, image forming apparatus, and process cartridge'20138,483,583'Image forming apparatus and toner supply method'20138,442,414'Seal member, developing device, process cartridge, and image forming apparatus'20138,275,285'Process cartridge and image forming apparatus'20128,260,186'Toner cartridge with refillable fresh and residual toner chambers, process cartridge, and method of making toner cartridge reusable'20128,208,832'Toner-collecting device and image forming apparatus'20128,160,476'Latent image carrier having pairs of first and second positioning protrusions and image forming apparatus'20128,135,313'Powder transport screw, and development device, process unit and image-forming apparatus comprising this powder transport screw'20128,135,329'Toner conveyer device, process cartridge, and image forming apparatus'20128,103,195'Toner agitating unit, toner hopper, process cartridge, and image forming apparatus'20128,095,035'Developing device, process unit, and image forming apparatus, with supporting members, grooves, and supported developing roller'20128,081,897'Seal member, developing device, process cartridge, and image forming apparatus'20118,019,254'Toner conveying device, process cartridge, and image forming apparatus'20117,979,013'Developing device of image forming apparatus'20117,965,958'Developing device, process cartridge and image forming apparatus'20117,965,957'Developing device and image forming apparatus that uses this developing device'20117,945,203'Waste-toner collecting device, process cartridge, and image forming apparatus'20117,917,077'Waste-toner housing device, and image forming apparatus'20117,890,044'Powder conveyance device, toner conveyance device, process cartridge and image forming apparatus'20117,873,302'Cleaning device and image forming apparatus'20117,706,724'Charging-roller bearing member, process cartridge, and image forming apparatus'20107,623,821'Conveyor device, process cartridge, image forming apparatus, and method of forming image'2009D0603450'Process cartridge for image forming apparatus'2009D0597129'Process cartridge for image forming apparatus'2009D0590011'Process cartridge for image forming apparatus'2009D0590012'Process cartridge for image forming apparatus'2009D0580968'Process cartridge for image forming apparatus'20087,424,263'Toner recovery belt conveyor, process cartridge, and image forming apparatus using the same'2008Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2008–2009Based in Oosaka, JP· patent location history
2009–2020Based in Osaka, JP· patent location history
2011–2020Patents assigned to RICOH CO LTD (53)· patent assignee history
2011–2019Patents assigned to KUBOTA TOMOHIRO (42)· patent assignee history
2011–2019Patents assigned to SHIMIZU YOSHIYUKI (31)· patent assignee history
2012–2019Patents assigned to HAMADA MANABU (18)· patent assignee history
2013–2019Patents assigned to NAKATAKE NAOKI (23)· patent assignee history
2014–2015Based in Saitama-shi, JP· patent location history
2015–2020Based in Kanagawa, JP· patent location history
2019–2020Based in Hachioji, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| RICOH CO LTD | 53 | 2011–2020 |
| KUBOTA TOMOHIROself | 42 | 2011–2019 |
| SHIMIZU YOSHIYUKI | 31 | 2011–2019 |
| NAKATAKE NAOKI | 23 | 2013–2019 |
| HAMADA MANABU | 18 | 2012–2019 |
Locations
| Location | Patents | Span |
|---|---|---|
| Osaka, JP | 50 | 2009–2020 |
| Kanagawa, JP | 6 | 2015–2020 |
| Oosaka, JP | 5 | 2008–2009 |
| Hachioji, JP | 4 | 2019–2020 |
| Saitama-shi, JP | 4 | 2014–2015 |