Inventor

Hidetoshi Ema

Inventor

Kanagawa, JP

Overview

30→

Patents

1991–2012

Patent span

Electricity

Primary field (CPC H)

Patents· 30 as inventor

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

H01Sprimary

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light26%

G11BInformation storage based on relative movement between record carrier and transducer23%

H04NPictorial communication, e.g. television16%

G06KGraphical data reading14%

H04LTransmission of digital information, e.g. telegraphic communication7%

G03GElectrography5%

G02BOptical elements, systems or apparatus2%

G06FElectric digital data processing2%

H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses2%

H03MCoding2%

PatentTitleYear

8,243,865'Data processing apparatus'2012 8,194,780'Differential signal output device'2012 8,023,605'Oversampling circuit and oversampling method'2011 7,791,634'Pixel clock generator, pulse modulator, and image forming apparatus'2010 7,746,971'Data recovery method, data recovery circuit, data transmitting/receiving apparatus and information processing apparatus'2010 7,684,531'Data recovery method and data recovery circuit'2010 7,573,790'Light source driving unit and optical storage apparatus'2009 7,518,969'Light source driving unit and optical storage apparatus'2009 7,480,230'Light source drive, optical information recording apparatus, and optical information recording method'2009 7,423,940'Signal processing method and signal processing apparatus'2008 7,200,091'Light source driving unit and optical storage apparatus'2007 7,193,957'Light source drive, optical information recording apparatus, and optical information recording method'2007 7,142,486'Signal processing method and signal processing apparatus'2006 7,050,080'Image forming apparatus for controlling image writing by adjusting image clock'2006 6,954,415'Light source drive, optical information recording apparatus, and optical information recording method'2005 6,917,639'Laser driver circuit'2005 6,791,596'Method and apparatus for image forming capable of effectively generating pixel clock pulses'2004 6,731,317'Pulse modulation signal generation circuit, and semiconductor laser modulation device, optical scanning device and image formation device using the same'2004 6,590,599'Apparatus and method for equivalently changing a write clock frequency'2003 6,498,617'Pulse width modulation circuit, optical write unit, image forming apparatus and optical write method'2002 6,442,183'Semiconductor laser drive control circuit and image forming system using the same'2002 6,118,798'Semiconductor laser control system'2000 5,946,334'Semiconductor laser control system'1999 5,784,091'Image forming system using digital ASIC and analog ASIC for processing image data and controlling semiconductor laser, and half-tone pixel representing method'1998 5,325,160'Half tone recording method and light source device for writing'1994 5,258,780'Beam recorder forming low density dots'1993 5,237,579'Semiconductor laser controller using optical-electronic negative feedback loop'1993 5,138,623'Semiconductor laser control device'1992 5,050,177'Laser diode driving circuit'1991 5,036,519'Semiconductor laser controller'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–2010Patents assigned to RICOH KK (27)· patent assignee history

1991–2005Based in Yokohama, JP· patent location history

2002–2012Based in Kanagawa, JP· patent location history

2010Based in Saitama-shi, JP· patent location history

2011–2012Patents assigned to RICOH CO LTD (3)· patent assignee history

2012Patents assigned to EMA HIDETOSHI (2)· patent assignee history

2012Patents assigned to TSUKAMOTO NOBUNARI (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
RICOH KK	27	1991–2010
RICOH CO LTD	3	2011–2012
EMA HIDETOSHIself	2	2012
TSUKAMOTO NOBUNARI	2	2012

Locations

Location	Patents	Span
Kanagawa, JP	18	2002–2012
Yokohama, JP	11	1991–2005
Saitama-shi, JP	1	2010