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Inventor

Akifumi Yamaguchi

Inventor
Osaka, JP

Overview

37→
Patents
1993–2020
Patent span
Physics
Primary field (CPC G)

Patents· 37 as inventor

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

G03Gprimary
G03GElectrography23%
G01CMeasuring distances, levels or bearings13%
G01SRadio direction-finding13%
G06FElectric digital data processing8%
B65HHandling thin or filamentary material, e.g. sheets, webs, cables7%
G01PMeasuring linear or angular speed, acceleration, deceleration, or shock7%
B41JTypewriters5%
G01NInvestigating or analysing materials by determining their chemical or physical properties5%
H04NPictorial communication, e.g. television5%
G01BMeasuring length, thickness or similar linear dimensions3%
PatentTitleYear
10,775,727Image forming apparatus with a charging amount acquisition unit that performs a charging amount acquisition operation for forming a measurement toner image on an image carrier202010,698,337Image forming apparatus with developer information acquisition unit that acquires information relating to deterioration of developer based on an acquired toner charging amount202010,691,052Image forming apparatus202010,481,522Developing device with developing roller and thickness regulating member and image forming apparatus provided with same201910,345,738Stirring/conveying member, and developing device and image forming apparatus therewith201910,185,281Image forming apparatus provided with a photosensitive member having a photosensitive layer and a surface protection layer which is formed on the surface of the photosensitive layer and which has a hardness higher than that of the photosensitive layer201910,175,608Developing device and image forming apparatus provided with same20199,377,718'Image forming apparatus and developer supply method'20169,366,995'Developing device and image forming apparatus provided with same'20169,323,179'Developing unit and image forming apparatus'20169,310,718'Development device and image forming apparatus including the same'20169,304,479'Image forming apparatus'20169,282,275'Television and electronic apparatus'20169,232,171'Electronic apparatus with cooling unit'20169,086,480'Optical distance-measuring device and electronic device'20159,031,472'Developing device with a developer conveying member having paddles connecting spiral blades at one circumferential position and image forming apparatus with such a developing device'20158,958,724'Developing device and image forming apparatus'20158,780,330'Optical distance-measuring device and electronic device'20148,531,838'Television apparatus and electronic device'20138,390,793'Optical ranging sensor and electronic equipment'20138,384,011'Optical detection device and electronic equipment for detecting at least one of an X-coordinate and a Y-coordinate of an object'20138,373,128'Optical ranging sensor and electronic device'20137,995,189'Optical distance measuring sensor and electronic device'20117,986,520'Electronic device'20117,760,332'Optical range-finding sensor, object detection device, self-cleaning toilet seat, and method for manufacturing optical range-finding sensor'20107,505,121'Multi-beam optical range sensor and self-propelled cleaner and air-conditioner equipped with the same'20097,330,241'Optical distance measuring sensor, self-propelled cleaner, and air conditioner'20087,119,887'Optical distance measuring sensor and self-propelled cleaner'20067,109,507'Optical object identifying device and printing apparatus'20067,030,402'Optical distance measuring device and printing apparatus using the same'20067,012,691'Optical moving information measuring apparatus and carrier system incorporating the same'20067,005,661'Optical object identification apparatus, and printing apparatus and object classification apparatus using same'20066,947,146'Optical object identification device and printing apparatus using the same'20056,859,266'Optical movement detecting device and transport system using the same'20056,690,457'Optical inclination sensor'20046,674,517'Optical motion detector, transport system and transport processing system'20045,177,357'Transmissive-type photo-interruptor with molded housing and crosstalk shielding'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2015Patents assigned to SHARP KK (19)· patent assignee history
2004–2009Based in Kashiba, JP· patent location history
2010Based in Nara, JP· patent location history
2011–2016Patents assigned to TOSHIBA KK (4)· patent assignee history
2011–2020Based in Osaka, JP· patent location history
2011–2016Based in Kawasaki, JP· patent location history
2013–2015Patents assigned to YAMAGUCHI AKIFUMI (6)· patent assignee history
2013–2015Patents assigned to KUBO MASARU (5)· patent assignee history
2015–2020Patents assigned to KYOCERA DOCUMENT SOLUTIONS INC (14)· patent assignee history
2016Based in Kunitachi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SHARP KK191993–2015
KYOCERA DOCUMENT SOLUTIONS INC142015–2020
YAMAGUCHI AKIFUMIself62013–2015
KUBO MASARU52013–2015
TOSHIBA KK42011–2016
Locations
LocationPatentsSpan
Osaka, JP202011–2020
Kashiba, JP112004–2009
Kawasaki, JP32011–2016
Kunitachi, JP12016
Nara, JP12010