Inventor · disambiguated record
Tadaaki Hirai
Also filed as: HIRAI TADAAKI · SASANO AKIRA
43 granted patents·561 citations·filing 1974–2009
98Inventor score
Files withHITACHI LTD34JAPAN BROADCASTING CORP2NIPPON TELEGRAPH & TELEPHONE2HAMAMATSU PHOTONICS KK1HITACHI DENSHI KABUSHIKI KABUS1
Top patents by PatentIndex Score
43 records- 0186US4255686AStorage type photosensor containing silicon and hydrogenHITACHI LTD·Filed 1979·Granted Mar 10, 1981·23 cites·9 claims
- 0285US4121537AApparatus for vacuum depositionHITACHI LTD·Filed 1977·Granted Oct 24, 1978·35 cites·6 claims
- 0384US4952839APhotoconductive device and method of operating the sameHITACHI LTD·Filed 1989·Granted Aug 28, 1990·28 cites·4 claims
- 0483US4888521APhotoconductive device and method of operating the sameHITACHI LTD·Filed 1987·Granted Dec 19, 1989·26 cites·46 claims
- 0579US5196702APhoto-sensor and method for operating the sameHITACHI LTD·Filed 1991·Granted Mar 23, 1993·56 cites·6 claims
- 0679US4249106ARadiation sensitive screenHITACHI LTD·Filed 1979·Granted Feb 3, 1981·16 cites·7 claims
- 0773US5101255AAmorphous photoelectric conversion device with avalancheISHIOKA SACHIO·Filed 1989·Granted Mar 31, 1992·32 cites·20 claims
- 0873US4982095AMulti-element type radiation detectorHITACHI LTD·Filed 1988·Granted Jan 1, 1991·29 cites·3 claims
- 0972US7217929B2Radiation detectorHAMAMATSU PHOTONICS KK·Filed 2003·Granted May 15, 2007·16 cites·19 claims
- 1071US4233506APhoto-sensorNIPPON TELEGRAPH & TELEPHONE·Filed 1978·Granted Nov 11, 1980·17 cites·22 claims
- 1170US5233265APhotoconductive imaging apparatusHITACHI LTD·Filed 1990·Granted Aug 3, 1993·37 cites·19 claims
- 1270US4900975ATarget of image pickup tube having an amorphous semiconductor laminateHITACHI LTD·Filed 1987·Granted Feb 13, 1990·16 cites·12 claims
- 1370US4556817APhotoelectric conversion apparatusHITACHI LTD·Filed 1983·Granted Dec 3, 1985·13 cites·14 claims
- 1468US4227078APhoto-sensorNIPPON TELEGRAPH & TELEPHONE·Filed 1978·Granted Oct 7, 1980·15 cites·22 claims
- 1568US4007473ATarget structures for use in photoconductive image pickup tubes and method of manufacturing the sameHITACHI LTD·Filed 1975·Granted Feb 8, 1977·11 cites·17 claims
- 1665US4564784AReduced degradation, high resolution image pickup tubeHITACHI LTD·Filed 1983·Granted Jan 14, 1986·11 cites·20 claims
- 1763US4040985APhotoconductive filmsHITACHI LTD·Filed 1976·Granted Aug 9, 1977·16 cites·3 claims
- 1861US4323912ASolid-state imaging deviceHITACHI LTD·Filed 1980·Granted Apr 6, 1982·19 cites·5 claims
- 1960US5583345AMethod of and apparatus for picking up and displaying a stereoscopic image from an object permeated with radioactive raysHITACHI LTD·Filed 1994·Granted Dec 10, 1996·18 cites·17 claims
- 2060US5023896AX-ray television apparatusHITACHI MEDICAL CORP·Filed 1989·Granted Jun 11, 1991·17 cites·16 claims
- 2157US4980736AElectric conversion deviceHITACHI LTD·Filed 1988·Granted Dec 25, 1990·15 cites·41 claims
- 2251US4429325APhotosensorHITACHI LTD·Filed 1980·Granted Jan 31, 1984·12 cites·12 claims
- 2350US4307319ASemiconductor layer of oxygen depletion type cerium oxide or lead oxideHITACHI LTD·Filed 1978·Granted Dec 22, 1981·5 cites·5 claims
- 2448US3984722APhotoconductive target of an image pickup tube and method for manufacturing the sameHITACHI LTD·Filed 1974·Granted Oct 5, 1976·7 cites·27 claims
- 2546US5818064AMethod of and apparatus for picking up and displaying a stereoscopic image from an object permeated with radioactive raysHITACHI LTD·Filed 1996·Granted Oct 6, 1998·11 cites·29 claims
- 2645US4829345AElectronic device having light transmission systemHITACHI LTD·Filed 1986·Granted May 9, 1989·8 cites·8 claims
- 2744US5021705AMethod of fabricating an image pick-up tube and target section used therewithHITACHI LTD·Filed 1989·Granted Jun 4, 1991·5 cites·23 claims
- 2843US4394749APhotoelectric device and method of producing the sameHITACHI LTD·Filed 1980·Granted Jul 19, 1983·8 cites·8 claims
- 2942US4556816APhotoelectric deviceHITACHI LTD·Filed 1983·Granted Dec 3, 1985·8 cites·8 claims
- 3041US8415662B2Radiation detector having a plurality of amorphous selenium layersOGUSU KOICHI·Filed 2009·Granted Apr 9, 2013·2 cites·10 claims
- 3138US4331506AMethod of manufacturing target of image pickup tubeHITACHI LTD·Filed 1980·Granted May 25, 1982·3 cites·6 claims
- 3238US4330733APhotoconductive targetJAPAN BROADCASTING CORP·Filed 1980·Granted May 18, 1982·7 cites·5 claims
- 3337US4866332ATarget of image pickup tubeHITACHI LTD·Filed 1987·Granted Sep 12, 1989·3 cites·22 claims
- 3436US4636682AImage pickup tubeHITACHI LTD·Filed 1983·Granted Jan 13, 1987·2 cites·19 claims
- 3534US4626885APhotosensor having impurity concentration gradientHITACHI LTD·Filed 1983·Granted Dec 2, 1986·4 cites·15 claims
- 3633US4884011ALight-detecting deviceHITACHI LTD·Filed 1988·Granted Nov 28, 1989·3 cites·23 claims
- 3731US5218264AImage pick-up tube and apparatus having the sameHITACHI LTD·Filed 1990·Granted Jun 8, 1993·2 cites·30 claims
- 3831US4860093AMethod and apparatus for driving a plurality of pick-up tubes having their cathodes supplied by a common negative potentialHITACHI LTD·Filed 1988·Granted Aug 22, 1989·1 cites·18 claims
- 3930US5070272APhotoconductive device and method of operating sameHITACHI LTD·Filed 1990·Granted Dec 3, 1991·2 cites·17 claims
- 4030US4883562AMethod of making a photosensorHITACHI LTD·Filed 1989·Granted Nov 28, 1989·2 cites·12 claims
- 4129US5384597AImage pickup tube utilizing third electrode and its operating methodHITACHI LTD·Filed 1991·Granted Jan 24, 1995·0 cites·20 claims
- 4229US4617248ADoped photoconductive film including selenium and telluriumJAPAN BROADCASTING CORP·Filed 1985·Granted Oct 14, 1986·0 cites·13 claims
- 4324US4206384AImage pick-up tube target having transparent conductive strips with shallow sidesHITACHI DENSHI KABUSHIKI KABUS·Filed 1978·Granted Jun 3, 1980·0 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Tadaaki Hirai files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →