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Inventor

Tetsuro Hirota

Inventor
Kanagawa, JP

Overview

35→
Patents
1986–2019
Patent span
Physics
Primary field (CPC G)

Patents· 35 as inventor

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

G03Gprimary
G03GElectrography46%
B41JTypewriters28%
G01NInvestigating or analysing materials by determining their chemical or physical properties9%
B65HHandling thin or filamentary material, e.g. sheets, webs, cables4%
G01FMeasuring volume, volume flow, mass flow or liquid level4%
G01BMeasuring length, thickness or similar linear dimensions2%
G01MTesting static or dynamic balance of machines or structures2%
G06KGraphical data reading2%
G11BInformation storage based on relative movement between record carrier and transducer2%
PatentTitleYear
10,317,814Powder supply device and image forming apparatus incorporating same201910,228,632Powder detection device, image forming apparatus, powder detection method, and non-transitory recording medium201910,114,323Sheet size detector and image processing apparatus201810,099,876Sheet material thickness detection device, sheet material anomaly detection device, sheet material feeding device, and image forming device201810,031,016Fluid detection apparatus to detect a quantity of fluid using a vibration20189,817,335'Powder amount detector, powder supply device, and image forming apparatus incorporating same'20179,645,538'Developing device, and image forming apparatus and process cartridge incorporating same'20179,523,940'Powder detector, developing device, process cartridge, image forming apparatus, and powder detecting method'20169,523,664'Powder detector, image forming apparatus including same, and powder detecting method'20169,507,290'Magnetic permeability detector, developing device, image forming apparatus, and oscillation signal frequency calculation method therefor'20169,507,291'Magnetic permeability detector, developing device, image forming apparatus, and oscillation signal frequency calculation method therefor'20169,170,233'Magnetic permeability detector, developing device, image forming apparatus, and oscillation signal frequency calculation method therefor'20159,158,228'Development device and image forming apparatus incorporating same'20158,948,638'Image forming apparatus'20158,929,782'Development device, and image forming apparatus and process cartridge incorporating same'20158,897,681'Developing device, image forming apparatus, and image forming method'20148,824,935'Development device, process cartridge incorporating same, and image forming apparatus incorporating same'20148,594,540'Development device, process cartridge incorporating same, and image forming apparatus incorporating same'20138,433,211'Developing device, process cartridge, and image forming apparatus'20138,376,494'Image forming device and image forming apparatus'20138,259,142'Image forming apparatus with developer passage amount control electrodes'20128,186,799'Image forming apparatus and impact position displacement correction method'20128,157,342'Liquid-jet device, image forming apparatus, and method for adjusting landing positions of liquid droplets'20128,066,348'Image forming apparatus and defective nozzle detection method'20117,992,953'Image forming apparatus and method of correcting deviation of shooting position'20117,914,096'Image forming apparatus, landing position shift correction method, and landing position shift correction sheet member'20116,331,052'Ink jet printing apparatus'20016,147,766'Printing apparatus for increasing efficiency in transmitting image data between internal control units'20006,053,597'Ink jet recording apparatus and method for automatically changing recording operation mode when interchangeable recording head unit is replaced'20005,821,953'Ink-jet head driving system'19985,818,482'Ink jet printing head'19985,754,202'Ink jet recording apparatus'19984,661,822'Ink jet printer'19874,644,372'Ink jet printer'19874,620,249'Apparatus for driving a floppy disc'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–2001Patents assigned to RICOH KK (9)· patent assignee history
1986Based in Tokyo, JP· patent location history
1987Based in Zama, JP· patent location history
1998–2013Based in Hadano, JP· patent location history
2000–2019Based in Kanagawa, JP· patent location history
2011–2019Patents assigned to RICOH CO LTD (26)· patent assignee history
2011–2019Patents assigned to HIROTA TETSURO (23)· patent assignee history
2011Based in Hadeno, JP· patent location history
2013–2015Patents assigned to KUROKAWA ATSUSHI (6)· patent assignee history
2015–2017Patents assigned to HOSOKAWA HIROSHI (6)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RICOH CO LTD262011–2019
HIROTA TETSUROself232011–2019
RICOH KK91986–2001
HOSOKAWA HIROSHI62015–2017
KUROKAWA ATSUSHI62013–2015
Locations
LocationPatentsSpan
Kanagawa, JP242000–2019
Hadano, JP71998–2013
Zama, JP21987
Hadeno, JP12011
Tokyo, JP11986