Takuhei Yokoyama

Person

Osaka, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Image forming apparatus, system, and method for detecting malfunction
- Patent number 12,153,838
- Issue date Nov 26, 2024
- Ricoh Company, Ltd.
- Takuhei Yokoyama
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Reading device, image forming apparatus, and color mixture preventi...
- Patent number 11,457,121
- Issue date Sep 27, 2022
- Ricoh Company, Ltd.
- Takuhei Yokoyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Photoelectric conversion device, defective pixel determining method...
- Patent number 10,542,184
- Issue date Jan 21, 2020
- Ricoh Company, Ltd.
- Takuhei Yokoyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical writing device, image forming apparatus, and method of cont...
- Patent number 9,302,497
- Issue date Apr 5, 2016
- Ricoh Company, Limited
- Masayuki Hayashi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Image forming device and control method for image forming device
- Patent number 9,268,284
- Issue date Feb 23, 2016
- Ricoh Company, Limited
- Takuhei Yokoyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and method for controlling the same
- Patent number 9,141,893
- Issue date Sep 22, 2015
- Ricoh Company, Limited
- Akinori Yamaguchi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Light source control apparatus and image forming apparatus
- Patent number 9,013,532
- Issue date Apr 21, 2015
- Ricoh Company, Ltd.
- Kunihiro Komai
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Imaging forming apparatus
- Patent number 8,885,213
- Issue date Nov 11, 2014
- Ricoh Company, Ltd.
- Takuhei Yokoyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus including image forming calibration
- Patent number 8,879,969
- Issue date Nov 4, 2014
- Ricoh Company, Limited
- Takeshi Shikama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Line-head control device, image forming apparatus, and line-head co...
- Patent number 8,817,320
- Issue date Aug 26, 2014
- Ricoh Company, Limited
- Yoshinori Shirasaki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image processing apparatus, an image forming apparatus, an image pr...
- Patent number 8,774,700
- Issue date Jul 8, 2014
- Ricoh Company, Ltd.
- Takeshi Shikama
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Image processing apparatus, image processing method, and computer p...
- Patent number 8,659,630
- Issue date Feb 25, 2014
- Ricoh Company, Limited
- Kunihiro Komai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image forming apparatus and image density detecting method
- Patent number 8,654,419
- Issue date Feb 18, 2014
- Ricoh Company, Limited
- Susumu Miyazaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of compensating for errors caused by a print head using skew...
- Patent number 8,600,283
- Issue date Dec 3, 2013
- Ricoh Company, Ltd.
- Izumi Kinoshita
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Optical writing device, image forming apparatus, optical writing me...
- Patent number 8,576,267
- Issue date Nov 5, 2013
- Ricoh Company, Limited
- Motohiro Kawanabe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Light emission control device, light emission control method, and i...
- Patent number 8,547,409
- Issue date Oct 1, 2013
- Ricoh Company, Limited
- Takuhei Yokoyama
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Optical writing device, image forming apparatus, and method and pro...
- Patent number 8,482,588
- Issue date Jul 9, 2013
- Ricoh Company, Limited
- Tatsuya Miyadera
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical writing device, image forming apparatus, and method and pro...
- Patent number 8,411,124
- Issue date Apr 2, 2013
- Ricoh Company, Limited
- Izumi Kinoshita
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Optical writing device, image forming apparatus, method of controll...
- Patent number 8,294,744
- Issue date Oct 23, 2012
- Ricoh Company, Limited
- Izumi Kinoshita
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
IMAGE FORMING APPARATUS, SYSTEM, AND METHOD
- Publication number 20240069823
- Publication date Feb 29, 2024
- Takuhei YOKOYAMA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
READING DEVICE, IMAGE FORMING APPARATUS, AND COLOR MIXTURE PREVENTI...
- Publication number 20220141350
- Publication date May 5, 2022
- RICOH COMPANY, LTD.
- Takuhei YOKOYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND METHOD OF CONT...
- Publication number 20140139607
- Publication date May 22, 2014
- Masayuki Hayashi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
IMAGE FORMING APPARATUS AND METHOD FOR CONTROLLING THE SAME
- Publication number 20130242318
- Publication date Sep 19, 2013
- Akinori YAMAGUCHI
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
IMAGE FORMING DEVICE AND CONTROL METHOD FOR IMAGE FORMING DEVICE
- Publication number 20130207339
- Publication date Aug 15, 2013
- Takuhei YOKOYAMA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20130084109
- Publication date Apr 4, 2013
- Takeshi SHIKAMA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
LIGHT SOURCE CONTROL APPARATUS AND IMAGE FORMING APPARATUS
- Publication number 20130063536
- Publication date Mar 14, 2013
- Kunihiro KOMAI
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, OPTICAL WRITING ME...
- Publication number 20120300010
- Publication date Nov 29, 2012
- Motohiro KAWANABE
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
IMAGE FORMING APPARATUS AND METHOD OF ADJUSTING IMAGE
- Publication number 20120262750
- Publication date Oct 18, 2012
- RICOH COMPANY, LTD.
- Izumi KINOSHITA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE DENSITY DETECTING METHOD
- Publication number 20120229866
- Publication date Sep 13, 2012
- Susumu MIYAZAKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
LINE-HEAD CONTROL DEVICE, IMAGE FORMING APPARATUS, AND LINE-HEAD CO...
- Publication number 20120154827
- Publication date Jun 21, 2012
- Yoshinori Shirasaki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
LIGHT EMISSION CONTROL DEVICE, LIGHT EMISSION CONTROL METHOD, AND I...
- Publication number 20120147114
- Publication date Jun 14, 2012
- Takuhei YOKOYAMA
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND COMPUTER P...
- Publication number 20120062682
- Publication date Mar 15, 2012
- Kunihiro Komai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND METHOD AND PRO...
- Publication number 20120062681
- Publication date Mar 15, 2012
- Tatsuya MIYADERA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
IMAGE PROCESSING APPARATUS, AN IMAGE FORMING APPARATUS, AN IMAGE PR...
- Publication number 20120061909
- Publication date Mar 15, 2012
- RICOH COMPANY, LTD.
- Takeshi SHIKAMA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND METHOD AND PRO...
- Publication number 20120056961
- Publication date Mar 8, 2012
- Izumi KINOSHITA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
IMAGE PROCESSING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE PROC...
- Publication number 20120057889
- Publication date Mar 8, 2012
- RICOH COMPANY, LTD.
- Akinori YAMAGUCHI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, METHOD OF CONTROLL...
- Publication number 20110043592
- Publication date Feb 24, 2011
- Izumi KINOSHITA
- G06 - COMPUTING CALCULATING COUNTING

Takuhei Yokoyama

Person

Patents Grantslast 30 patents

Image forming apparatus, system, and method for detecting malfunction

Reading device, image forming apparatus, and color mixture preventi...

Photoelectric conversion device, defective pixel determining method...

Optical writing device, image forming apparatus, and method of cont...

Image forming device and control method for image forming device

Image forming apparatus and method for controlling the same

Light source control apparatus and image forming apparatus

Imaging forming apparatus

Image forming apparatus including image forming calibration

Line-head control device, image forming apparatus, and line-head co...

Image processing apparatus, an image forming apparatus, an image pr...

Image processing apparatus, image processing method, and computer p...

Image forming apparatus and image density detecting method

Method of compensating for errors caused by a print head using skew...

Optical writing device, image forming apparatus, optical writing me...

Light emission control device, light emission control method, and i...

Optical writing device, image forming apparatus, and method and pro...

Optical writing device, image forming apparatus, and method and pro...

Optical writing device, image forming apparatus, method of controll...

Patents Applicationslast 30 patents

IMAGE FORMING APPARATUS, SYSTEM, AND METHOD

READING DEVICE, IMAGE FORMING APPARATUS, AND COLOR MIXTURE PREVENTI...

OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND METHOD OF CONT...

IMAGE FORMING APPARATUS AND METHOD FOR CONTROLLING THE SAME

IMAGE FORMING DEVICE AND CONTROL METHOD FOR IMAGE FORMING DEVICE

IMAGE FORMING APPARATUS

LIGHT SOURCE CONTROL APPARATUS AND IMAGE FORMING APPARATUS

OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, OPTICAL WRITING ME...

IMAGE FORMING APPARATUS AND METHOD OF ADJUSTING IMAGE

IMAGE FORMING APPARATUS AND IMAGE DENSITY DETECTING METHOD

LINE-HEAD CONTROL DEVICE, IMAGE FORMING APPARATUS, AND LINE-HEAD CO...

LIGHT EMISSION CONTROL DEVICE, LIGHT EMISSION CONTROL METHOD, AND I...

IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND COMPUTER P...

OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND METHOD AND PRO...

IMAGE PROCESSING APPARATUS, AN IMAGE FORMING APPARATUS, AN IMAGE PR...

OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND METHOD AND PRO...

IMAGE PROCESSING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE PROC...

OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, METHOD OF CONTROLL...