Inventor · disambiguated record
Tsunao Hasegawa
Also filed as: HASEGAWA TSUNAO
10 granted patents·159 citations·filing 1979–1994
90Inventor score
Files withPIONEER ELECTRONIC CORP10
Top patents by PatentIndex Score
10 records- 0193US4639681AWaveform reshaping circuitPIONEER ELECTRONIC CORP·Filed 1985·Granted Jan 27, 1987·69 cites·3 claims
- 0272US4297730AMagnetic recording and reproducing devicePIONEER ELECTRONIC CORP·Filed 1979·Granted Oct 27, 1981·17 cites·11 claims
- 0366US4553180ARecording start position setting device for use in a tape recorderPIONEER ELECTRONIC CORP·Filed 1984·Granted Nov 12, 1985·13 cites·2 claims
- 0464US5461604APCM digital audio signal playback apparatusPIONEER ELECTRONIC CORP·Filed 1994·Granted Oct 24, 1995·15 cites·1 claims
- 0559US4352130AMagnetic sound recorder having computer-controlled adjusting devicePIONEER ELECTRONIC CORP·Filed 1979·Granted Sep 28, 1982·10 cites·6 claims
- 0652US5267095ADigital reconstructing of harmonics to extend band of frequency responsePIONEER ELECTRONIC CORP·Filed 1991·Granted Nov 30, 1993·9 cites·6 claims
- 0752US4344094AMethod and apparatus detecting and setting optimum tape recording biasPIONEER ELECTRONIC CORP·Filed 1979·Granted Aug 10, 1982·7 cites·8 claims
- 0851US4719525ATrack position correction for a helical scan magnetic playbackPIONEER ELECTRONIC CORP·Filed 1986·Granted Jan 12, 1988·8 cites·8 claims
- 0947US4312020AFrequency response adjusting device for magnetic sound recorderPIONEER ELECTRONIC CORP·Filed 1979·Granted Jan 19, 1982·6 cites·11 claims
- 1040US4405953AMagnetic recording and reproducing devicePIONEER ELECTRONIC CORP·Filed 1981·Granted Sep 20, 1983·5 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →