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Inventor

Tomoji Ishikawa

Inventor
Yokohama, JP

Overview

43→
Patents
1992–2021
Patent span
Physics
Primary field (CPC G)

Patents· 43 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G03Gprimary
G03GElectrography65%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof9%
F02BInternal-combustion piston engines4%
F02FCylinders, pistons or casings, for combustion engines4%
F04BPositive-displacement machines for liquids4%
Y02TClimate change mitigation technologies related to transportation4%
H01FMagnets2%
H01LSemiconductor devices2%
H03HImpedance networks, e.g. resonant circuits2%
H10NElectric solid-state devices not otherwise provided for2%
PatentTitleYear
11,011,297Semiconductor device and semiconductor module20219,529,303'Toner container and manufacturing method for toner container'20169,436,127'Toner container and manufacturing method for toner container'20169,213,261'Toner container and manufacturing method for toner container'20159,170,530'Powder container and image forming apparatus incorporating same'20158,532,542'Toner container and manufacturing method for toner container'20138,311,447'Toner container and manufacturing method for toner container'20127,486,916'Method and apparatus of image forming and process cartridge included in the apparatus'20097,162,189'Method and apparatus of image forming and process cartridge included in the apparatus'20077,146,122'Image forming apparatus and image forming unit'20067,136,610'Image forming apparatus using installable process cartridge, method of positioning process cartridge, and process cartridge itself'20067,114,928'High-pressure fuel pump and assembly structure of high-pressure pump'20067,072,602'Image forming apparatus and image forming unit'20067,062,207'Powder transport apparatus and image forming apparatus that can stabilize replenishment of powder'20066,910,644'Solenoid-operated fuel injection valve'20056,554,590'High pressure pump'20036,336,020'Image forming apparatus having an improved developer-supplying mechanism and method thereof'20026,256,459'Developing apparatus and image forming apparatus using the same developing apparatus and method of determining end-of-toner condition'20016,122,469'Image forming apparatus including a preventing mechanism for preventing a developing unit from rotating'20006,105,883'Fuel injector for an internal combustion engine'20006,104,900'Image forming apparatus having an improved developer-supplying mechanism and method thereof'20006,072,967'PC drum integrated revolving type developing unit with pull-out supporter'20006,070,811'Fuel injector for an internal combustion engine'20006,070,037'Image forming apparatus having improved developer limiting member'20005,991,569'PC drum integrated revolving type developing unit with pull-out supporter'19995,956,549'Rotary developing device for an image forming apparatus'19995,940,664'Agitation and charging device for an image forming apparatus'19995,850,586'Rotary developing device for an image forming apparatus'19985,826,146'Color image forming device which changes developing bias when switching between developer units'19985,796,206'Controller and controlling method for piezoelectric actuator'19985,787,328'Rotary developing device for an image forming apparatus'19985,768,664'Toner container for a rotary developing device'19985,765,059'Developing device for image forming apparatus and toner container therefor'19985,761,576'Image forming apparatus for supplying power to members of a rotary developing device'19985,758,235'Toner container for a rotary developing device'19985,671,470'Color image forming device which changes developing bias when switching between developer units'19975,646,721'Image forming apparatus for supplying power to members of a rotary developing device'19975,617,198'Image forming apparatus having rotary developing device'19975,565,973'Rotary developing device for an image forming apparatus'19965,552,877'Image forming apparatus with controlled drive for accurately positioning developing sections of a rotary developing device'19965,416,568'Developing unit for an image forming apparatus'19955,235,384'Image forming apparatus with replaceable process units'19935,109,254'Developing apparatus'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–2009Patents assigned to RICOH KK (30)· patent assignee history
1992–2016Based in Yokohama, JP· patent location history
1998–2006Patents assigned to TOYOTA MOTOR CO LTD (6)· patent assignee history
1998–2006Based in Okazaki, JP· patent location history
2000–2015Based in Kanagawa, JP· patent location history
2012–2016Patents assigned to ISHIKAWA TOMOJI (6)· patent assignee history
2012–2016Patents assigned to RICOH CO LTD (6)· patent assignee history
2012–2016Patents assigned to INOUE ATSUSHI (5)· patent assignee history
2021Based in Kyoto, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RICOH KK301992–2009
ISHIKAWA TOMOJIself62012–2016
RICOH CO LTD62012–2016
TOYOTA MOTOR CO LTD61998–2006
INOUE ATSUSHI52012–2016
Locations
LocationPatentsSpan
Yokohama, JP311992–2016
Okazaki, JP61998–2006
Kanagawa, JP52000–2015
Kyoto, JP12021