Hidetoshi Ema

Person

Kanagawa-ken, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Data processing apparatus
- Patent number 8,243,865
- Issue date Aug 14, 2012
- Ricoh Company, Ltd.
- Nobunari Tsukamoto
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Differential signal output device
- Patent number 8,194,780
- Issue date Jun 5, 2012
- Ricoh Company, Ltd.
- Nobunari Tsukamoto
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Oversampling circuit and oversampling method
- Patent number 8,023,605
- Issue date Sep 20, 2011
- Ricoh Company, Ltd.
- Nobunari Tsukamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Pixel clock generator, pulse modulator, and image forming apparatus
- Patent number 7,791,634
- Issue date Sep 7, 2010
- Ricoh Company, Limited
- Naruhiro Masui
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Data recovery method, data recovery circuit, data transmitting/rece...
- Patent number 7,746,971
- Issue date Jun 29, 2010
- Ricoh Company, Ltd.
- Naruhiro Masui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data recovery method and data recovery circuit
- Patent number 7,684,531
- Issue date Mar 23, 2010
- Ricoh Company, Ltd.
- Naruhiro Masui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Light source driving unit and optical storage apparatus
- Patent number 7,573,790
- Issue date Aug 11, 2009
- Ricoh Company, Ltd.
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Light source driving unit and optical storage apparatus
- Patent number 7,518,969
- Issue date Apr 14, 2009
- Ricoh Company, Ltd.
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Light source drive, optical information recording apparatus, and op...
- Patent number 7,480,230
- Issue date Jan 20, 2009
- Ricoh Company, Ltd.
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Signal processing method and signal processing apparatus
- Patent number 7,423,940
- Issue date Sep 9, 2008
- Ricoh Company, Ltd.
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Light source driving unit and optical storage apparatus
- Patent number 7,200,091
- Issue date Apr 3, 2007
- Ricoh Company, Ltd.
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Light source drive, optical information recording apparatus, and op...
- Patent number 7,193,957
- Issue date Mar 20, 2007
- Ricoh Company, Ltd.
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Signal processing method and signal processing apparatus
- Patent number 7,142,486
- Issue date Nov 28, 2006
- Ricoh Company, Ltd.
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Image forming apparatus for controlling image writing by adjusting...
- Patent number 7,050,080
- Issue date May 23, 2006
- Ricoh Company, Ltd.
- Hidetoshi Ema
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Light source drive, optical information recording apparatus, and op...
- Patent number 6,954,415
- Issue date Oct 11, 2005
- Ricoh Company, Ltd.
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Laser driver circuit
- Patent number 6,917,639
- Issue date Jul 12, 2005
- Ricoh Company, Ltd.
- Masaaki Ishida
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method and apparatus for image forming capable of effectively gener...
- Patent number 6,791,596
- Issue date Sep 14, 2004
- Ricoh Company, Ltd.
- Yasuhiro Nihei
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Pulse modulation signal generation circuit, and semiconductor laser...
- Patent number 6,731,317
- Issue date May 4, 2004
- Ricoh Company, Ltd.
- Hidetoshi Ema
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for equivalently changing a write clock frequency
- Patent number 6,590,599
- Issue date Jul 8, 2003
- Ricoh Company, Ltd.
- Hidetoshi Ema
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Pulse width modulation circuit, optical write unit, image forming a...
- Patent number 6,498,617
- Issue date Dec 24, 2002
- Ricoh Company, Ltd.
- Masaaki Ishida
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Semiconductor laser drive control circuit and image forming system...
- Patent number 6,442,183
- Issue date Aug 27, 2002
- Ricoh Company, Ltd.
- Hidetoshi Ema
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Semiconductor laser control system
- Patent number 6,118,798
- Issue date Sep 12, 2000
- Ricoh Company, Ltd.
- Hidetoshi Ema
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser control system
- Patent number 5,946,334
- Issue date Aug 31, 1999
- Ricoh Company, Inc.
- Hidetoshi Ema
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Image forming system using digital ASIC and analog ASIC for process...
- Patent number 5,784,091
- Issue date Jul 21, 1998
- Ricoh Company, Ltd.
- Hidetoshi Ema
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Half tone recording method and light source device for writing
- Patent number 5,325,160
- Issue date Jun 28, 1994
- Ricoh Company, Ltd.
- Susumu Imakawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Beam recorder forming low density dots
- Patent number 5,258,780
- Issue date Nov 2, 1993
- Ricoh Company, Ltd.
- Hidetoshi Ema
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor laser controller using optical-electronic negative fe...
- Patent number 5,237,579
- Issue date Aug 17, 1993
- Ricoh Co. Ltd.
- Hidetoshi Ema
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser control device
- Patent number 5,138,623
- Issue date Aug 11, 1992
- Ricoh Company, Ltd.
- Hidetoshi Ema
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Laser diode driving circuit
- Patent number 5,050,177
- Issue date Sep 17, 1991
- Ricoh Company, Ltd.
- Hidetoshi Ema
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor laser controller
- Patent number 5,036,519
- Issue date Jul 30, 1991
- Ricoh Company, Ltd.
- Hidetoshi Ema
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Differential signal output device
- Publication number 20090046784
- Publication date Feb 19, 2009
- Nobunari Tsukamoto
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Pixel Clock Generator, Pulse Modulator, and Image Forming Apparatus
- Publication number 20080143814
- Publication date Jun 19, 2008
- Naruhiro Masui
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
OVERSAMPLING CIRCUIT AND OVERSAMPLING METHOD
- Publication number 20080056420
- Publication date Mar 6, 2008
- Nobunari Tsukamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DATA PROCESSING APPARATUS
- Publication number 20070297548
- Publication date Dec 27, 2007
- Nobunari Tsukamoto
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Signal processing method and signal processing apparatus
- Publication number 20070070834
- Publication date Mar 29, 2007
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Light source drive, optical information recording apparatus, and op...
- Publication number 20070036059
- Publication date Feb 15, 2007
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Light source driving unit and optical storage apparatus
- Publication number 20070030785
- Publication date Feb 8, 2007
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Light source driving unit and optical storage apparatus
- Publication number 20070030784
- Publication date Feb 8, 2007
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Data recovery method, data recovery circuit, data transmitting/rece...
- Publication number 20060227916
- Publication date Oct 12, 2006
- Naruhiro Masui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Light source drive, optical information recording apparatus, and op...
- Publication number 20060007841
- Publication date Jan 12, 2006
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Data recovery method and data recovery circuit
- Publication number 20050135527
- Publication date Jun 23, 2005
- Naruhiro Masui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Light source drive, optical information recording apparatus, and op...
- Publication number 20040095853
- Publication date May 20, 2004
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Light source driving unit and optical storage apparatus
- Publication number 20030112732
- Publication date Jun 19, 2003
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Laser driver circuit
- Publication number 20030035451
- Publication date Feb 20, 2003
- Masaaki Ishida
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Method and apparatus for image forming capable of effectively gener...
- Publication number 20030025785
- Publication date Feb 6, 2003
- Yasuhiro Nihei
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Signal processing method and signal processing apparatus
- Publication number 20020196717
- Publication date Dec 26, 2002
- Naruhiro Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Apparatus and method for equivalently changing a write clock frequency
- Publication number 20020158965
- Publication date Oct 31, 2002
- RICOH COMPANY, LTD.
- Hidetoshi Ema
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Light-emission modulation having effective scheme of creating gray...
- Publication number 20020130944
- Publication date Sep 19, 2002
- Hidetoshi Ema
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Image forming apparatus for controlling image writing by adjusting...
- Publication number 20020051137
- Publication date May 2, 2002
- Ricoh Company, Ltd.
- Hidetoshi Ema
- G06 - COMPUTING CALCULATING COUNTING

Hidetoshi Ema

Person

Patents Grantslast 30 patents

Data processing apparatus

Differential signal output device

Oversampling circuit and oversampling method

Pixel clock generator, pulse modulator, and image forming apparatus

Data recovery method, data recovery circuit, data transmitting/rece...

Data recovery method and data recovery circuit

Light source driving unit and optical storage apparatus

Light source driving unit and optical storage apparatus

Light source drive, optical information recording apparatus, and op...

Signal processing method and signal processing apparatus

Light source driving unit and optical storage apparatus

Light source drive, optical information recording apparatus, and op...

Signal processing method and signal processing apparatus

Image forming apparatus for controlling image writing by adjusting...

Light source drive, optical information recording apparatus, and op...

Laser driver circuit

Method and apparatus for image forming capable of effectively gener...

Pulse modulation signal generation circuit, and semiconductor laser...

Apparatus and method for equivalently changing a write clock frequency

Pulse width modulation circuit, optical write unit, image forming a...

Semiconductor laser drive control circuit and image forming system...

Semiconductor laser control system

Semiconductor laser control system

Image forming system using digital ASIC and analog ASIC for process...

Half tone recording method and light source device for writing

Beam recorder forming low density dots

Semiconductor laser controller using optical-electronic negative fe...

Semiconductor laser control device

Laser diode driving circuit

Semiconductor laser controller

Patents Applicationslast 30 patents

Differential signal output device

Pixel Clock Generator, Pulse Modulator, and Image Forming Apparatus

OVERSAMPLING CIRCUIT AND OVERSAMPLING METHOD

DATA PROCESSING APPARATUS

Signal processing method and signal processing apparatus

Light source drive, optical information recording apparatus, and op...

Light source driving unit and optical storage apparatus

Light source driving unit and optical storage apparatus

Data recovery method, data recovery circuit, data transmitting/rece...

Light source drive, optical information recording apparatus, and op...

Data recovery method and data recovery circuit

Light source drive, optical information recording apparatus, and op...

Light source driving unit and optical storage apparatus

Laser driver circuit

Method and apparatus for image forming capable of effectively gener...

Signal processing method and signal processing apparatus

Apparatus and method for equivalently changing a write clock frequency

Light-emission modulation having effective scheme of creating gray...

Image forming apparatus for controlling image writing by adjusting...