Inventor
NAKAMURA MASAFUMI
JP62 patents
⚠️ This page may combine multiple inventors who share the name “NAKAMURA MASAFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
25 patentsUS6009237ADec 28, 1999
Optical disk and optical disk reproduction apparatus
HITACHI LTD333 citations99
US6002834ADec 14, 1999
Optical disk having table relating sector address and time and optical disk reproducing apparatus
HITACHI LTD145 citations99
US5768298AJun 16, 1998
Information recording method, reproducing method and reproducing apparatus
HITACHI LTD40 citations96
US6728408B1Apr 27, 2004
Water-mark embedding method and system
HITACHI LTD35 citations93
US6438172B1Aug 20, 2002
Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium
HITACHI LTD19 citations93
US6308003B1Oct 23, 2001
Method of recording image data and method of reproducing information from optical disk
HITACHI LTD25 citations93
US6076184AJun 13, 2000
Information recording method, reproducing method, and reproducing apparatus
HITACHI LTD20 citations93
US5974581AOct 26, 1999
Information recording method, reproducing method, and reproducing apparatus
HITACHI LTD19 citations93
US5589995ADec 31, 1996
Header information of information signal recording and reproducing method and apparatus therefor
HITACHI LTD19 citations93
US6549579B2Apr 15, 2003
Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium
HITACHI LTD10 citations82
US6424477B1Jul 23, 2002
Information signal recording and playback method and apparatus therefor
HITACHI LTD13 citations82
US6314542B1Nov 6, 2001
Information recording method, reproducing method, and reproducing apparatus
HITACHI LTD13 citations82
US6181664B1Jan 30, 2001
Disk cartridge and disk device using the same
HITACHI LTD13 citations82
US4675855AJun 23, 1987
Reproducing rate control apparatus for information recording disc
HITACHI LTD21 citations82
US4580255AApr 1, 1986
Servo circuit for a signal reproducing apparatus
HITACHI LTD21 citations82
US7019927B2Mar 28, 2006
Information signal recording and playback method and apparatus therefor
HITACHI LTD6 citations74
US6108299AAug 22, 2000
Disk cartridge and disk device using the same
HITACHI LTD7 citations74
US5991260ANov 23, 1999
Disk cartridge and disk device using the same
HITACHI LTD6 citations74
US5983387ANov 9, 1999
Information recording method, reproducing method, and reproducing apparatus
HITACHI LTD8 citations74
US5956193ASep 21, 1999
Information signal recording and playback method and apparatus therefor
HITACHI LTD5 citations74
US4581728AApr 8, 1986
Plural beam tracking servo including delay compensation
HITACHI LTD16 citations74
US4912524AMar 27, 1990
Digital signal transmission system having conversion means for reducing the light emission time of a light emitting diode
HITACHI LTD12 citations69
US6657831B2Dec 2, 2003
Information signal recording and playback method and apparatus therefor
HITACHI LTD1 citations63
US6075763AJun 13, 2000
Disk cartridge and disk device using the same
HITACHI LTD2 citations63
US7565061B2Jul 21, 2009
Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium
HITACHI LTD0 citations52
HITACHI AMERICA LTD
4 patentsUS5687275ANov 11, 1997
Trick play data indentification methods and apparatus for use with digital video recording and playback devices
HITACHI AMERICA LTD104 citations98
US5729649AMar 17, 1998
Methods and apparatus for recording data on a digital storage medium in a manner that facilitates the reading back of data during trick play operation
HITACHI AMERICA LTD64 citations96
US5623344AApr 22, 1997
Digital video recording device with trick play capability
HITACHI AMERICA LTD50 citations96
US5583650ADec 10, 1996
Digital recording and playback device error correction methods and apparatus for use with trick play data
HITACHI AMERICA LTD35 citations92
NEC CORP
3 patentsUS7138992B2Nov 21, 2006
Method of calibrating luminance of display, driving circuit of display employing same method and portable electronic device provided with same driving circuit
NEC CORP20 citations93
US6552711B1Apr 22, 2003
Display device and information terminal
NEC CORP28 citations93
US6836074B2Dec 28, 2004
Organic electro-luminescence display driving system and mobile communication terminal used this system
NEC CORP11 citations74
HONDA MOTOR CO LTD
3 patentsUS7927653B2Apr 19, 2011
Metal mold repair method and metal mold repair paste agent
HONDA MOTOR CO LTD8 citations82
US6474196B2Nov 5, 2002
Method of producing press-forming punch and die
HONDA MOTOR CO LTD9 citations72
US6521157B2Feb 18, 2003
Method for fabricating press forming die and method for fabricating press forming punch
HONDA MOTOR CO LTD6 citations61
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
3 patentsUS4988958AJan 29, 1991
Amplitude-controlled trapezoidal wave generating circuit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations70
US4947312AAug 7, 1990
Non-resonance type AC power source apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations70
US4985648AJan 15, 1991
Switching output circuit with high speed operation and low power consumption
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations56
PANASONIC CORP
2 patentsMITSUBISHI CHEM ENG CORP
1 patentTADANO LTD
1 patentYOKOGAWA ELECTRIC CORP
1 patentASAHI CHEMICAL IND
1 patentUNIV LELAND STANFORD JUNIOR
1 patentBAYER MATERIALSCIENCE AG
1 patentPANASONIC IP MAN CO LTD
1 patentPIONEER ELECTRONIC CORP
1 patentADVANTEST CORP
1 patentHITACHI CONSUMER ELECTRONICS
1 patentShowing the top 50 of 62 patents by PatentIndex Score.