Inventor
SAKAMOTO ETSUROU
JP22 patents
⚠️ This page may combine multiple inventors who share the name “SAKAMOTO ETSUROU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
21 patentsUS6437933B1Aug 20, 2002
Recording medium for protecting copyrighted data
SONY CORP58 citations97
US5923486AJul 13, 1999
Recording and reproducing system for protecting copyrighted data
SONY CORP61 citations97
US7265927B2Sep 4, 2007
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP11 citations92
US6744588B2Jun 1, 2004
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP11 citations82
US6687076B2Feb 3, 2004
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP9 citations82
US7359137B2Apr 15, 2008
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP2 citations74
US7277248B2Oct 2, 2007
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP2 citations74
US6894860B2May 17, 2005
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP4 citations74
US6490113B2Dec 3, 2002
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP8 citations74
US5287196AFeb 15, 1994
Method and apparatus for recording video information signals to avoid interference during after-recording
SONY CORP7 citations74
US5381358AJan 10, 1995
Cyclic digital filter
SONY CORP8 citations73
US5267022ANov 30, 1993
Video signal processing apparatus for videotape recorder/reproducer capable of effecting vertical (and horizontal) emphasis and deemphasis on chrominance signals
SONY CORP7 citations73
US5105274AApr 14, 1992
Circuits for reducing noise in a video signal
SONY CORP9 citations73
US7236320B2Jun 26, 2007
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP0 citations63
US6778344B2Aug 17, 2004
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP0 citations63
US6744584B2Jun 1, 2004
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP0 citations63
US5276403AJan 4, 1994
Nonlinear preemphasis-deemphasis system
SONY CORP3 citations62
US5276562AJan 4, 1994
Emphasis apparatus disposed in either a record or playback system having triple weight coefficient generating devices
SONY CORP5 citations62
US5200835AApr 6, 1993
Demodulator for fm modulated video signals with pre-demodulation sideband suppression and post-demodulation sideband restoration
SONY CORP6 citations62
US6873485B2Mar 29, 2005
Recording medium and apparatus for protecting copyrighted digital data
SONY CORP0 citations52
US5119199AJun 2, 1992
Fm demodulator for video tape recorder
SONY CORP0 citations41