LexDanaLexDanabeta
Inventor

Isao Doi

Inventor
Toyonaka, JP

Overview

53→
Patents
1986–2018
Patent span
Physics
Primary field (CPC G)

Patents· 53 as inventor

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

G03Gprimary
G03GElectrography61%
B41JTypewriters9%
F01LCyclically operating valves for machines or engines6%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
Y10TTechnical subjects covered by former us classification3%
B05BSpraying apparatus2%
F02BInternal-combustion piston engines2%
F16CShafts2%
H04NPictorial communication, e.g. television2%
PatentTitleYear
9,874,116Valve-timing control device for internal combustion engine20189,683,465'Valve-timing control apparatus for internal combustion engine'20179,115,611'Variable valve operating apparatus for internal combustion engine'20158,881,399'Method of manufacturing a nozzle plate for a liquid ejection head'20148,162,439'Method for manufacturing nozzle plate for liquid ejection head, nozzle plate for liquid ejection head and liquid ejection head'20127,665,829'Liquid solution ejecting apparatus'20106,661,555'Light shutter device'20036,441,941'Light shutter device'20026,347,894'Light shutter device'20026,124,965'Optical element and light shutter device using the same'20005,930,565'Image forming apparatus'19995,881,343'Charging method and charging device'19995,862,443'Electrostatic recording apparatus having a floating electrode on a photoelectric transfer member'19995,860,046'Charging method and charging device'19995,790,925'Electrophotographic image forming apparatus with low ozone generation'19985,774,169'Image forming apparatus'19985,652,649'Charging device and image forming apparatus'19975,572,294'Contact charger and image forming apparatus provided with same'19965,557,372'Contact charger and image forming apparatus provided with same'19965,557,375'Contact type charging device and image forming apparatus having the same'19965,536,610'Photosensitive member having surface protective layer with specified optical properties'19965,396,317'Magnetic particle-containing member for use in copying machine'19955,330,873'Production method of photosensitive member by eliminating outermost surface portion of photosensitive layer'19945,308,727'Photosensitive member excellent in antioxidation'19945,242,773'Photosensitive member having fine cracks in surface protective layer'19935,242,776'Organic photosensitive member having fine irregularities on its surface'19935,232,799'Organic photosensitive member comprising a binder resin and a solvent'19935,198,317'Organic photosensitive member comprising a charge transport layer with a binder resin and a solvent'19935,155,002'Image forming method'19925,139,906'Photosensitive medium with a protective layer of amorphous hydrocarbon having an absorption coefficient greater than 10,000 cm.sup.-1'19925,138,381'Image forming apparatus equipped with separating pawl with specified surface roughness'19925,125,644'Separating device for sheet-like member including separating pawl coated with amorphous carbon layer'19925,096,793'Photosensitive member excellent in antioxidation'19925,082,756'Photosensitive member for retaining electrostatic latent images'19924,994,337'Photosensitive member having an overcoat layer'19914,971,880'Developer containing halogenated amorphous carbon particles prepared by plasma-polymerization'19904,965,156'Photosensitive member having an overcoat layer and process for manufacturing the same'19904,891,292'Photosensitive member having an amorphous carbon overcoat layer'19904,886,724'Photosensitive member having an overcoat layer and process for manufacturing the same'19894,882,256'Photosensitive member having an overcoat layer comprising amorphous carbon'19894,876,168'Photosensitive member comprising charge generating layer and charge transporting layer comprising amorphous carbon containing chalogen or transition metal'19894,851,313'Photosensitive member comprising charge generating layer and charge transporting layer and process for preparing same'19894,847,653'Triboelectrically charging member'19894,810,606'Photosensitive member comprising charge generating layer and charge transporting layer'19894,801,515'Photosensitive member having an overcoat layer'1989D0298318'Stand and handset for telephone answering machine'19884,698,287'Photosensitive member having an amorphous silicon layer'19874,686,164'Electrophotosensitive member with multiple layers of amorphous silicon'19874,683,184'Electrophotosensitive member having alternating amorphous semiconductor layers'19874,683,185'Electrophotosensitive member having a depletion layer'19874,681,825'Electrophotosensitive member having an amorphous silicon-germanium layer'19874,659,639'Photosensitive member with an amorphous silicon-containing insulating layer'19874,576,127'Valve timing control device for an internal combustion engine'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–2018Based in Isehara, JP· patent location history
1987–1996Patents assigned to MINOLTA CAMERA KK (31)· patent assignee history
1987–2014Based in Toyonaka, JP· patent location history
1989–1994Based in Osaka, JP· patent location history
1993Based in Toyonaki, JP· patent location history
1996–2003Patents assigned to MINOLTA CO LTD (14)· patent assignee history
2010–2014Patents assigned to KONICA MINOLTA HOLDINGS INC (3)· patent assignee history
2012–2014Patents assigned to DOI ISAO (2)· patent assignee history
2015–2018Patents assigned to HITACHI AUTOMOTIVE SYSTEMS LTD (3)· patent assignee history
2015Based in Atsugi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MINOLTA CAMERA KK311987–1996
MINOLTA CO LTD141996–2003
HITACHI AUTOMOTIVE SYSTEMS LTD32015–2018
KONICA MINOLTA HOLDINGS INC32010–2014
DOI ISAOself22012–2014
Locations
LocationPatentsSpan
Toyonaka, JP361987–2014
Osaka, JP111989–1994
Isehara, JP31986–2018
Atsugi, JP12015
Toyonaki, JP11993