Inventor · disambiguated record
Tohru Sampei
Also filed as: SAMPEI TOHRU
17 granted patents·450 citations·filing 1974–1988
95Inventor score
Top patents by PatentIndex Score
17 records- 0191US4422109AMagnetic recording and reproducing apparatus automatically adjustable to each individual magnetic tapeHITACHI LTD·Filed 1982·Granted Dec 20, 1983·46 cites·39 claims
- 0290US4435832ASpeech synthesizer having speech time stretch and compression functionsHITACHI LTD·Filed 1980·Granted Mar 6, 1984·94 cites·14 claims
- 0389US3961280AAmplifier circuit having power supply voltage responsive to amplitude of input signalHITACHI LTD·Filed 1974·Granted Jun 1, 1976·40 cites·6 claims
- 0483US4443741ADrive circuit for electroluminescent elementHITACHI LTD·Filed 1981·Granted Apr 17, 1984·41 cites·9 claims
- 0583US4401971AAlarm device for a vehicle including priority control for plural alarm conditionsHITACHI LTD·Filed 1981·Granted Aug 30, 1983·105 cites·6 claims
- 0681US4551777ATracking servo system for magnetic recording and reproducing apparatus using flexible magnetic diskHITACHI LTD·Filed 1982·Granted Nov 5, 1985·24 cites·5 claims
- 0775US4168471ASource follower circuit using FETsHITACHI LTD·Filed 1978·Granted Sep 18, 1979·14 cites·9 claims
- 0867US5084786AMagnetic tape memory apparatus with axially displaced heads enabling after recording and verificationHITACHI LTD·Filed 1988·Granted Jan 28, 1992·17 cites·9 claims
- 0963US4796140ARemovable disk constructionHITACHI LTD·Filed 1986·Granted Jan 3, 1989·15 cites·9 claims
- 1056US4163197AAudio-frequency power amplifierHITACHI LTD·Filed 1978·Granted Jul 31, 1979·8 cites·14 claims
- 1155US4613920AMagnetic head for magnetic diskHITACHI LTD·Filed 1983·Granted Sep 23, 1986·8 cites·8 claims
- 1255US4100501AAudio frequency power amplifierHITACHI LTD·Filed 1977·Granted Jul 11, 1978·8 cites·8 claims
- 1354US4422108ATape recorderHITACHI LTD·Filed 1982·Granted Dec 20, 1983·11 cites·11 claims
- 1451US4068187AAudio-frequency power amplifiersHITACHI LTD·Filed 1977·Granted Jan 10, 1978·7 cites·8 claims
- 1537US4045744ALow-frequency power amplifierHITACHI LTD·Filed 1976·Granted Aug 30, 1977·3 cites·7 claims
- 1632US4390747ASpeech analyzerHITACHI LTD·Filed 1980·Granted Jun 28, 1983·5 cites·3 claims
- 1726US4491958ASpeech synthesizerNIPPON TELEGRAPH & TELEPHONE·Filed 1981·Granted Jan 1, 1985·4 cites·1 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →