Inventor
Tadashi Ogawa
Inventor
Tokyo, JP
Overview
Patents· 158 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Gprimary
G03GElectrography45%
G03CPhotosensitive materials for photographic purposes19%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
H03JTuning resonant circuits4%
H05BElectric heating2%
Y10TTechnical subjects covered by former us classification2%
G11BInformation storage based on relative movement between record carrier and transducer1%
A61BDiagnosis1%
B01DSeparation1%
C04BLime, magnesia1%
PatentTitleYear
10,409,196Image forming apparatus including developing devices, developing containers, and changeable conveyance paths between the developing devices and the developing containers20199,983,526Fixing device and image forming apparatus including same20189,971,289Image forming apparatus20189,927,748'Fixing device and image forming apparatus'20189,811,031'Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the same'20179,727,008'Fixing device and image forming apparatus including the fixing device'20179,715,203'Fixing device and image forming apparatus including same'20179,690,243'Image forming apparatus including a fixing device that includes a radiant heat heating source and a fixing member that rotates before an abnormality solved'20179,658,576'Developing device, and process cartridge and image forming apparatus incorporating same'20179,529,297'Developing device, process cartridge, and image forming apparatus including same'20169,507,306'Fixing device with a temperature detector adjacent an easily deformable location and image forming apparatus including same'20169,507,313'Image forming apparatus with removable unit and a connectable device to connect to the removable unit'20169,454,114'Fixing device and image forming apparatus including same'20169,405,270'Fixing device and image forming apparatus incorporating same'20169,405,250'Fixing device capable of minimizing damage of endless rotary body and image forming apparatus incorporating same'20169,405,242'Fixing device and image forming device'20169,395,652'Developing unit, process cartridge, and image forming apparatus'20169,367,010'Fixing device and image forming device'20169,360,816'Toner bottle driving device control method and image forming apparatus'20169,341,986'Developing device, image forming apparatus, and process cartridge'20169,323,176'Powder supply device and image forming apparatus incorporating same'20169,316,972'Fixing device and image forming apparatus incorporating same'20169,316,971'Image forming method for forming toner image on recording medium'20169,291,967'Fixing device and image forming apparatus incorporating same'20169,244,383'Toner supplying device and image forming apparatus having a projection which interacts with a depression of a toner container to prevent adhering of toner to an interior of the toner container'20169,239,559'Fixing device and image forming apparatus including same'20169,239,553'Fixing device and image forming apparatus'20169,235,177'Fixing device and image forming apparatus incorporating same'20169,207,596'Image forming apparatus including a fixing device'20159,195,173'Developing device and image forming apparatus and process cartridge incorporating same'2015D0743059'Light-emitting diode lamp'20159,152,108'Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the same'20159,152,106'Fixing device and image forming apparatus including same'20159,141,047'Fixing device and image forming apparatus'20159,069,304'Image forming apparatus'20159,063,493'Fixing device'20159,063,480'Fixing device, image forming device, and separating member'20159,052,658'Fixing device with a temperature detector adjacent an easily deformable location and image forming apparatus including same'20159,046,838'Fixing device and image forming apparatus'20159,042,761'Fixing device and image forming apparatus'20159,037,008'Fixing device and image forming apparatus including same'20159,031,439'Fixing device and image forming device'20159,031,485'Fixing device and endless belt assembly'20159,026,024'Fixing device capable of minimizing damage of endless rotary body and image forming apparatus incorporating same'20159,008,558'Separator and separation device, fixing device, and image forming apparatus incorporating same'20158,989,607'Thermal fixing device and image forming apparatus including same which detects the speed of a belt on the outer surface of a fixing member'20158,989,643'Fixing device with endless belt and image forming apparatus incorporating same'20158,971,779'Fixing device with support and image forming apparatus incorporating same'20158,971,782'Fixing device, image forming apparatus incorporating same, and method for heating fixing rotary body'20158,958,710'Fixing device, image forming apparatus incorporating same, and fixing method'20158,953,994'Fixing device and image forming apparatus incorporating same'20158,953,966'Fixing device and image forming apparatus'20158,953,960'Fixing device and image forming apparatus'20158,953,991'Fixing device and image forming apparatus'20158,953,995'Fixing device and endless belt assembly'20158,929,791'Fixing device and endless belt assembly'20158,918,042'Fixing device and image forming apparatus including the fixing device'20148,909,117'Fixing device and image forming apparatus incorporating same'20148,891,990'Image forming apparatus and method for forming toner image on recording medium'20148,886,090'Fixing device including an engagement-disengagement unit and image forming apparatus equipped with the fixing device'20148,886,101'Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the same'20148,886,103'Fixing device capable of minimizing damage of endless belt and image forming apparatus incorporating same'20148,873,984'Fixing device, image forming apparatus incorporating same, and fixing method'20148,855,506'Image forming apparatus'20148,831,498'Fixing device and guide mechanism included therein'20148,811,843'Image forming apparatus for forming toner image on recording medium'20148,811,842'Fixing device and image forming apparatus'20148,755,733'Fixing device, fixing method, image forming apparatus, and image forming method'20148,750,776'Fixing roller, and fixing device and image forming apparatus incorporating same'20148,737,861'Fixing device and image forming apparatus'20148,718,502'Fixing device and image forming apparatus incorporating same having a tube which penetrates through a heater and passes infrared rays to a temperature detector'20148,706,016'Fixing device and image forming apparatus incorporating the fixing device'20148,676,078'Fixing device, image forming apparatus incorporating same, and method for fixing toner image on recording medium'20148,626,018'Fixing unit and image forming apparatus'20148,588,628'Fixing device and image forming apparatus'20138,577,232'Thermal fixing device and image forming apparatus including same which detects the speed of a belt on the outer surface of a fixing member'20138,543,046'Fixing device, image forming apparatus incorporating same, and fixing method'20138,494,434'Fixing device and image forming apparatus incorporating the fixing device'20138,488,981'Fixing device and image forming apparatus using the same'20138,463,166'Fixing device and image forming apparatus'20138,447,199'Fixing device and image forming apparatus including same'20138,385,797'Fixing device and image forming apparatus incorporating same'20138,346,117'Fixing device and image forming apparatus using same'20138,112,023'Image forming apparatus and fixing device'20128,014,711'Fixing unit having enhanced temperature control and image forming apparatus using the same'20117,885,590'Image forming apparatus and fixing device'20117,817,952'Fixer and image forming apparatus including the same'20107,801,457'Fixing device, image forming apparatus including the fixing device, and fixing method'20107,796,933'Fixing device using electromagnetic induction heating and image forming apparatus including same'20107,783,240'Fixing device, image forming apparatus including the fixing device, and fixing method'20107,778,581'Fixing unit having enhanced heating efficiency and image forming apparatus using the same'20107,734,208'Image fixing apparatus and image forming apparatus capable of effectively controlling an image fixing temperature'20107,693,439'Fixing device, and method and device for heating control used in the same'20107,546,049'Image forming device with a control means to correct the fixing control temperature'20097,509,085'Image forming apparatus, fixing apparatus and toner'20097,202,298'Polyamide resin composition for part of engine cooling water system and part comprising the same'20076,090,688'Method for fabricating an SOI substrate'20006,044,769'In-pipe work apparatus'20006,021,812'Ball plug valve'20006,004,860'SOI substrate and a method for fabricating the same'19995,820,962'Optical recording material and optical recording medium'19985,698,740'Hole-transport material'19975,681,664'Hole-transporting material and use thereof'19975,496,689'Silver halide color photographic materials'19965,482,824'Silver halide photographic material and silver halide emulsion'19965,405,735'Silver halide color photographic light-sensitive materials'19955,258,272'Silver halide photographic material and silver halide emulsion'19935,229,261'Silver halide photographic material'19935,206,125'Silver halide color photographic material'19935,198,328'Silver halide color photographic light-sensitive material'19935,153,111'Composition for color-development and method for processing using same'19925,114,837'Silver halide color photographic material'19925,075,204'Silver halide color photosensitive material having a reflective support and a specified volume ratio'19915,057,405'Silver-halide color photographic light-sensitive material'19915,019,252'Portable water purifier'19915,011,768'Silver halide photographic material'19914,946,772'Silver halide emulsions and photographic materials'1990H0000760'Silver halide photographic materials'19904,895,794'Silver halide emulsions having host crystals with guest crystals formed in projection thereon and photographic materials containing such emulsions'19904,894,321'Photographic support and color photosensitive material'19904,894,319'Color image-forming process for high silver chloride color photographic material having improved spectral sensitivity and silver removability'19904,857,444'Color photographic light-sensitive material'19894,857,449'Silver halide color photographic photosensitive materials'19894,851,327'Photographic color photosensitive material with two layer reflective support'1989D0301554'Apparatus for locating the center of gravity of a golf ball'19894,837,140'Color image-forming high silver chloride color photographic material having improved spectral sensitivity and silver removability for use therewith'19894,822,726'Method for formation of color images and high silver chloride color photographic materials having improved spectral sensitivity and desilvering property for use therewith'19894,818,674'Silver halide emulsions comprising grains with (100) surfaces having conjugated (110) surface crystals thereon and method for the preparation thereof'19894,806,460'Multilayer silver halide color photographic materials'19894,797,349'Method for forming a color image comprising developing a light sensitive material containing a surfactant with a developer not containing benzyl alcohol'19894,791,053'Silver halide photographic material'19884,786,588'Silver halide photographic materials'19884,774,168'Method for forming color image with a color developer not containing benzyl alcohol'19884,762,775'Silver halide photographic material'19884,735,894'Silver halide photographic emulsion and photographic material containing the same which comprise junction-type silver halide crystal grains'19884,686,175'Silver halide multi-layered color photographic light sensitive material'19874,652,515'Silver halide color photographic materials having improved development characteristics'19874,627,877'Method and apparatus for continuously producing a cement clinker'19864,617,259'Silver halide color photographic material'19864,599,301'Silver halide color photographic material'19864,532,644'X-ray computerized tomograph'19854,484,340'Multichannel current measuring apparatus for X-ray computerized tomograph'19844,435,503'Silver halide color photographic light-sensitive material'19844,426,445'Silver halide photographic light-sensitive material'19844,411,987'Silver halide color photographic light-sensitive material'19834,366,237'Silver halide color photographic light-sensitive material'19824,301,540'Electronic tuning type receiver with digital to analog converter'19814,295,823'Apparatus for continuously producing a cement clinker'19814,263,581'Manual tuning pulse generator'19814,236,901'Air cleaner with secondary air filter element'19804,237,373'Magnetic tape running state and tape run amount display device'19804,225,968'Electronic tuning type receiver having a band display and numerical frequency display'19804,210,115'Warm air intake system for an internal combustion engine'19804,205,271'Control device of electronic preset type tuner for multi-band radio receiver'19804,205,353'Combination device having a magnetic recording and reproducing unit and an electronic tuning type receiver'19804,205,270'Station selection indicating device'19804,196,395'Preset state indicating unit in an electronic tuning type receiver'19804,126,472'Process of making a lithographic photosensitive silver halide emulsion having reduced susceptibility to pressure containing an iridium compound, a hydroxytetrazaindene and a polyoxyethylene'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1992Based in Minami-ashigara, JP· patent location history
1980–1981Based in Tokorozawa, JP· patent location history
1984–2019Based in Tokyo, JP· patent location history
1984–1996Based in Kanagawa, JP· patent location history
1986–2018Patents assigned to OGAWA TADASHI (76)· patent assignee history
2010–2014Based in Machida, JP· patent location history
2011–2019Patents assigned to RICOH CO LTD (82)· patent assignee history
2013–2018Patents assigned to HASE TAKAMASA (54)· patent assignee history
2013–2018Patents assigned to YUASA SHUUTAROH (53)· patent assignee history
2014–2018Patents assigned to KAWATA TEPPEI (52)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| RICOH CO LTD | 82 | 2011–2019 |
| OGAWA TADASHIself | 76 | 1986–2018 |
| HASE TAKAMASA | 54 | 2013–2018 |
| YUASA SHUUTAROH | 53 | 2013–2018 |
| KAWATA TEPPEI | 52 | 2014–2018 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 85 | 1984–2019 |
| Kanagawa, JP | 30 | 1984–1996 |
| Machida, JP | 13 | 2010–2014 |
| Minami-ashigara, JP | 9 | 1978–1992 |
| Tokorozawa, JP | 4 | 1980–1981 |