P

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 patents
US6009237ADec 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 patents

NEC CORP

3 patents

HONDA MOTOR CO LTD

3 patents

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

3 patents

PANASONIC CORP

2 patents

MITSUBISHI CHEM ENG CORP

1 patent

TADANO LTD

1 patent

YOKOGAWA ELECTRIC CORP

1 patent

ASAHI CHEMICAL IND

1 patent

UNIV LELAND STANFORD JUNIOR

1 patent

BAYER MATERIALSCIENCE AG

1 patent

PANASONIC IP MAN CO LTD

1 patent

PIONEER ELECTRONIC CORP

1 patent

ADVANTEST CORP

1 patent

HITACHI CONSUMER ELECTRONICS

1 patent

Showing the top 50 of 62 patents by PatentIndex Score.