Inventor · disambiguated record
Etsurou Sakamoto
Also filed as: SAKAMOTO ETSUROU
22 granted patents·2 pending applications·211 citations·filing 1990–2012
95Inventor score
Top patents by PatentIndex Score
24 records- 0189US5923486ARecording and reproducing system for protecting copyrighted dataSONY CORP·Filed 1995·Granted Jul 13, 1999·61 cites·6 claims
- 0288US6437933B1Recording medium for protecting copyrighted dataSONY CORP·Filed 1997·Granted Aug 20, 2002·58 cites·18 claims
- 0387US7265927B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2003·Granted Sep 4, 2007·11 cites·23 claims
- 0485US6687076B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2001·Granted Feb 3, 2004·9 cites·4 claims
- 0583US6744588B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2003·Granted Jun 1, 2004·11 cites·29 claims
- 0679US7359137B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2007·Granted Apr 15, 2008·2 cites·18 claims
- 0779US7277248B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2006·Granted Oct 2, 2007·2 cites·6 claims
- 0875US6894860B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2003·Granted May 17, 2005·4 cites·88 claims
- 0971US6490113B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2001·Granted Dec 3, 2002·8 cites·25 claims
- 1063US2013108243A1Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2012·Application pending·0 cites
- 1161US2013100553A1Recording medium and apparatus for protecting copyrighted digital dataSUGIYAMA KOICHI·Filed 2012·Application pending·0 cites
- 1260US8284512B2Recording medium and apparatus for protecting copyrighted digital dataSUGIYAMA KOICHI·Filed 2007·Granted Oct 9, 2012·0 cites·12 claims
- 1358US7236320B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2005·Granted Jun 26, 2007·0 cites·6 claims
- 1451US6873485B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2003·Granted Mar 29, 2005·0 cites·24 claims
- 1549US6778344B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2003·Granted Aug 17, 2004·0 cites·24 claims
- 1649US6744584B2Recording medium and apparatus for protecting copyrighted digital dataSONY CORP·Filed 2003·Granted Jun 1, 2004·0 cites·18 claims
- 1745US5381358ACyclic digital filterSONY CORP·Filed 1993·Granted Jan 10, 1995·8 cites·5 claims
- 1844US5105274ACircuits for reducing noise in a video signalSONY CORP·Filed 1990·Granted Apr 14, 1992·9 cites·14 claims
- 1942US5267022AVideo signal processing apparatus for videotape recorder/reproducer capable of effecting vertical (and horizontal) emphasis and deemphasis on chrominance signalsSONY CORP·Filed 1991·Granted Nov 30, 1993·7 cites·8 claims
- 2041US5287196AMethod and apparatus for recording video information signals to avoid interference during after-recordingSONY CORP·Filed 1991·Granted Feb 15, 1994·7 cites·54 claims
- 2139US5200835ADemodulator for fm modulated video signals with pre-demodulation sideband suppression and post-demodulation sideband restorationSONY CORP·Filed 1991·Granted Apr 6, 1993·6 cites·10 claims
- 2237US5276562AEmphasis apparatus disposed in either a record or playback system having triple weight coefficient generating devicesSONY CORP·Filed 1992·Granted Jan 4, 1994·5 cites·5 claims
- 2334US5276403ANonlinear preemphasis-deemphasis systemSONY CORP·Filed 1991·Granted Jan 4, 1994·3 cites·6 claims
- 2430US5119199AFm demodulator for video tape recorderSONY CORP·Filed 1990·Granted Jun 2, 1992·0 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →