Inventor · disambiguated record
Akio Kumada
Also filed as: KUMADA AKIO
20 granted patents·558 citations·filing 1970–1989
96Inventor score
Top patents by PatentIndex Score
20 records- 0196US4352961ATransparent flat panel piezoelectric speakerHITACHI LTD·Filed 1980·Granted Oct 5, 1982·150 cites·13 claims
- 0292US4663556ATorsional mode ultrasonic vibratorHITACHI MAXELL·Filed 1985·Granted May 5, 1987·69 cites·9 claims
- 0391US4367426ACeramic transparent piezoelectric transducerHITACHI LTD·Filed 1981·Granted Jan 4, 1983·54 cites·8 claims
- 0483US4642509AUltrasonic motor using bending, longitudinal and torsional vibrationsHITACHI MAXELL·Filed 1986·Granted Feb 10, 1987·47 cites·10 claims
- 0581US4868446APiezoelectric revolving resonator and ultrasonic motorHITACHI MAXELL·Filed 1988·Granted Sep 19, 1989·41 cites·10 claims
- 0673US4947076APiezo electric motorHITACHI MAXELL·Filed 1988·Granted Aug 7, 1990·29 cites·7 claims
- 0771US5008581APiezoelectric revolving resonator and single-phase ultrasonic motorHITACHI MAXELL·Filed 1989·Granted Apr 16, 1991·30 cites·6 claims
- 0869US3990057AFerroelectric analog memory device and method of operating the sameHITACHI LTD·Filed 1975·Granted Nov 2, 1976·13 cites·10 claims
- 0967US4154505AElectro-optical light shutter deviceHITACHI LTD·Filed 1977·Granted May 15, 1979·19 cites·2 claims
- 1062US4471258APiezoelectric ceramic transducerHITACHI LTD·Filed 1981·Granted Sep 11, 1984·26 cites·21 claims
- 1152US4392747ADisplay device structureHITACHI LTD·Filed 1980·Granted Jul 12, 1983·11 cites·13 claims
- 1247US4478217ALaser surgical apparatusHITACHI LTD·Filed 1982·Granted Oct 23, 1984·26 cites·16 claims
- 1347US3953109ADomain switching elementHITACHI LTD·Filed 1974·Granted Apr 27, 1976·6 cites·9 claims
- 1445US4071841ADielectric matrix deviceHITACHI LTD·Filed 1975·Granted Jan 31, 1978·6 cites·27 claims
- 1542US4046455AIrregular ferroelectric element devised for motion of plural domain-wallsHITACHI LTD·Filed 1975·Granted Sep 6, 1977·5 cites·4 claims
- 1642US3936146AIrregular ferroelectric element for controllable single domainHITACHI LTD·Filed 1970·Granted Feb 3, 1976·5 cites·19 claims
- 1740US4496247ADisplay device with transparent cover as a vibrator of a sound generatorHITACHI LTD·Filed 1982·Granted Jan 29, 1985·7 cites·8 claims
- 1839US4367504APiezo-electric bimorph type transducerHITACHI ELECTRONICS·Filed 1981·Granted Jan 4, 1983·5 cites·5 claims
- 1937US3973247AMethod of writing and erasing information for electrooptic ceramic memoriesHITACHI LTD·Filed 1974·Granted Aug 3, 1976·5 cites·3 claims
- 2034US4088391AIrregular ferroelectric element devised for single domain-wall motionHITACHI LTD·Filed 1975·Granted May 9, 1978·4 cites·3 claims
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