Inventor
SUGAWARA TAKAO
JP29 patents
⚠️ This page may combine multiple inventors who share the name “SUGAWARA TAKAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
23 patentsUS7237173B2Jun 26, 2007
Recording and reproducing apparatus, signal decoding circuit, error correction method and iterative decoder
FUJITSU LTD110 citations98
US7054088B2May 30, 2006
Information recording and reproducing apparatus and method, and signal decoding circuit for performing timing recovery
FUJITSU LTD82 citations98
US5880904AMar 9, 1999
Disk drive having a thickness equal to an IC memory card
FUJITSU LTD56 citations95
US5287385AFeb 15, 1994
Viterbi decoding system including variable-order equalizer
FUJITSU LTD59 citations94
US7035029B2Apr 25, 2006
Method of and apparatus for recording/reading information, circuit for recording/reading signal
FUJITSU LTD38 citations92
US7031090B2Apr 18, 2006
Information recording and reproducing apparatus and method and signal decoding circuit having improved noise processing characteristics
FUJITSU LTD49 citations92
US6501610B1Dec 31, 2002
Detecting circuit for read signal from magnetic recording system using partial response
FUJITSU LTD52 citations92
US6052245AApr 18, 2000
Signal regenerating apparatus having asymmetrical signal detection circuit for detecting amplitude error and signal offset from a training signal and correcting same
FUJITSU LTD21 citations92
US6025973AFeb 15, 2000
Construction for attaching a disk in a disk drive
FUJITSU LTD30 citations92
US5790335AAug 4, 1998
Asymmetrical signal detector and signal regenerating apparatus using the same detector
FUJITSU LTD39 citations92
US5608592AMar 4, 1997
Head actuator
FUJITSU LTD24 citations92
US5432820AJul 11, 1995
Maximum-likelihood decoding method and device
FUJITSU LTD41 citations90
US6532122B1Mar 11, 2003
Data storage apparatus and magnetic recording method
FUJITSU LTD31 citations89
US7590929B2Sep 15, 2009
Record reproduction method, apparatus, and circuit for using error correcting code
FUJITSU LTD18 citations84
US7434136B2Oct 7, 2008
Method of and apparatus for reading recording medium, harddisk controller
FUJITSU LTD15 citations83
US7515369B2Apr 7, 2009
Information recording and reproducing apparatus and method, and signal decoding circuit for performing timing recovery
FUJITSU LTD7 citations74
US5892474AApr 6, 1999
Clock phase acquisition/tracking device and phase acquisition method
FUJITSU LTD12 citations74
US6016237AJan 18, 2000
Shaft construction of a disk drive
FUJITSU LTD6 citations73
US7110199B2Sep 19, 2006
Information recording and reproducing apparatus, signal decoding circuit, and information recording medium and method
FUJITSU LTD10 citations72
US7286596B2Oct 23, 2007
Training method for recording medium reproduction equalizer and recording medium reproduction apparatus
FUJITSU LTD6 citations63
US7138931B2Nov 21, 2006
Recording and reproducing apparatus
FUJITSU LTD2 citations63
US7355938B2Apr 8, 2008
Timing recovery method and storage apparatus for suppressing control of sampling positions
FUJITSU LTD0 citations52
US7085666B2Aug 1, 2006
Magnetic head testing apparatus
FUJITSU LTD0 citations25
SAMSUNG ELECTRONICS CO LTD
3 patentsUS7248425B2Jul 24, 2007
Disk writing/reproducing apparatus and method
SAMSUNG ELECTRONICS CO LTD34 citations92
US7814394B2Oct 12, 2010
Post viterbi error correction apparatus and related methods
SAMSUNG ELECTRONICS CO LTD7 citations74
US7965461B2Jun 21, 2011
Information reproducing apparatus
SAMSUNG ELECTRONICS CO LTD0 citations52