Inventor · disambiguated record
Toshihiko Numakura
Also filed as: HIRAI JUN · NISHIKAWA MASARU · NUMAKURA TOSHIHIKO · YAMAGIWA KAZUO
11 granted patents·159 citations·filing 1977–1992
91Inventor score
Files withSONY CORP11
Top patents by PatentIndex Score
11 records- 0182US5243411AAnti-piracy video tape system has anti-piracy components added to the luminance signal and the color difference signalsSONY CORP·Filed 1992·Granted Sep 7, 1993·60 cites·6 claims
- 0269US4220964ASecam recording and reproducing systemSONY CORP·Filed 1978·Granted Sep 2, 1980·16 cites·65 claims
- 0368US4180833AApparatus and method for reproducing video signalsSONY CORP·Filed 1978·Granted Dec 25, 1979·13 cites·5 claims
- 0461US4208673AColor recorder for reducing crosstalkSONY CORP·Filed 1977·Granted Jun 17, 1980·12 cites·69 claims
- 0560US4233621AMethod and apparatus for recording and reproducing a color-aligned line-sequential color video signalSONY CORP·Filed 1978·Granted Nov 11, 1980·12 cites·31 claims
- 0657US4193084AVideo recorder having means for maintaining constant the amplitude of the frequency-modulated signalSONY CORP·Filed 1977·Granted Mar 11, 1980·11 cites·25 claims
- 0753US4186411ARecording and playback modulation method and apparatusSONY CORP·Filed 1977·Granted Jan 29, 1980·7 cites·25 claims
- 0852US4780769ARecording and reproducing apparatus for time compressed video signals wherein said signals are expanded and converted into two separate channels before recordingSONY CORP·Filed 1986·Granted Oct 25, 1988·14 cites·4 claims
- 0940US4175272AVideo signal processing circuitry for compensating different average levelsSONY CORP·Filed 1978·Granted Nov 20, 1979·4 cites·9 claims
- 1038US4851928AApparatus for recording low and high bond components of a chrominance signalSONY CORP·Filed 1988·Granted Jul 25, 1989·6 cites·10 claims
- 1137US4268874ATransducer deflection apparatus for use in a video signal reproducing deviceSONY CORP·Filed 1979·Granted May 19, 1981·4 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →