Inventor

Tetsuji Kawashima

Inventor

Kanagawa, JP

Overview

1993–2012

Patent span

Physics

Primary field (CPC G)

Patents· 36 as inventor

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

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer79%

H03MCoding7%

B01DSeparation5%

G06TImage data processing or generation, in general5%

G06FElectric digital data processing2%

H04NPictorial communication, e.g. television2%

PatentTitleYear

8,213,284'Multi-layered rewritable optical disc recording apparatus and recording method'2012 7,940,636'Recording medium, recording apparatus and recording method'2011 7,423,952'Recording medium, recording apparatus and recording method'2008 7,319,651'Recording apparatus and recording method'2008 7,319,650'Recording apparatus and recording method'2008 7,319,649'Recording apparatus and recording method'2008 7,286,461'Optical disk driving apparatus and method, and recording medium and program used therewith'2007 7,177,251'Recording method, recording apparatus, reproduction method and reproduction apparatus for recording and reproducing data in which additional information is buried in contents data'2007 7,113,466'Recording apparatus and recording method'2006 7,000,171'Recorded medium reproducing device and method, data output controlling method, data outputting method, error detecting method, and data outputting reproducing method'2006 6,992,960'Recording apparatus and recording method'2006 6,990,054'Recording apparatus and recording method'2006 6,917,574'Data recording and reproducing apparatus and method for linking data using a decreased number of data linking blocks'2005 6,904,008'Recording apparatus and recording method'2005 6,819,642'Data recording device, data reproducing device, and optical disc'2004 6,765,851'Optical disc, data-recording apparatus and data-recording method'2004 6,717,894'Optical disc recording method and recording and/or reproducing apparatus operable to accommodate multiple disc formats'2004 6,704,262'Optical disc and optical disc apparatus for identifying synchronization patterns thereof'2004 6,693,855'Optical disc and optical disc apparatus'2004 6,636,461'Recording and/or reproducing method and apparatus having reciprocal time domain to binary conversion means'2003 6,621,776'Optical disc recording method and recording and/or reproducing apparatus'2003 6,567,018'Data recording medium, contents data, recording medium, data recording method and apparatus, and data reproducing method and apparatus'2003 6,519,217'Data record medium, data recording and/or reproducing apparatus, and record medium determining method'2003 6,438,084'Data recording apparatus and method, data playback apparatus and method, and optical disc'2002 6,353,585'Apparatus and method of forming evaluation signal used in adjusting focus bias and adjusting skew of disk drive'2002 6,339,580'Apparatus and method of forming evaluation signal used in adjusting focus bias and adjusting skew of disk drive'2002 6,041,029'Disc apparatus'2000 6,014,096'Data decoding method and device'2000 5,970,026'Temperature invariant, magneto-optic modulator coil driving circuit'1999 5,894,588'Data transmitting apparatus, data recording apparatus, data transmitting method, and data recording method'1999 5,805,932'System for transmitting compressed data if compression ratio is at least preset ratio and pre-compressed data if compression ratio is less than preset ratio'1998 5,684,772'Magneto-optical disc recording and reproducing system with level clamping'1997 5,495,455'Magneto-optical disk recording and reading apparatus and method wherein the recording head is controlled in the radial direction of the disk to a desired position'1996 5,237,554'Apparatus for generating clock signals for data reproduction'1993 5,189,650'Magneto-optical signal reproducing apparatus in which reproduced magneto-optical signal level is compared with reference signal level varied in accordance with in-phase signal'1993 5,182,734'Magneto-optical recording apparatus with pulse driven light beam and variable delay of magnetic field reversals based on recording medium characteristics'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2012Patents assigned to SONY CORP (36)· patent assignee history

1993–2012Based in Kanagawa, JP· patent location history

1996–1999Based in Chiba, JP· patent location history

2007Based in Tokyo, JP· patent location history

2012Patents assigned to ARAI KIYOSHI (1)· patent assignee history

2012Patents assigned to IFUKU TORU (1)· patent assignee history

2012Patents assigned to KAWASHIMA TETSUJI (1)· patent assignee history

2012Patents assigned to MAEDA HIDEHO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SONY CORP	36	1993–2012
ARAI KIYOSHI	1	2012
IFUKU TORU	1	2012
KAWASHIMA TETSUJIself	1	2012
MAEDA HIDEHO	1	2012

Locations

Location	Patents	Span
Kanagawa, JP	32	1993–2012
Chiba, JP	3	1996–1999
Tokyo, JP	1	2007