Inventor · disambiguated record
Yasuo Tamai
Also filed as: AMARI HIROSHI · OGAWA HIROSHI · TAMAI YASUO
77 granted patents·1,044 citations·filing 1971–1989
99Inventor score
Top patents by PatentIndex Score
77 records- 0196US4963433AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1989·Granted Oct 16, 1990·72 cites·8 claims
- 0296US4020236AProcess for producing a magnetic material and magnetic recording medium containing the sameFUJI PHOTO FILM CO LTD·Filed 1975·Granted Apr 26, 1977·51 cites·16 claims
- 0395US4063000AProcess for production of ferromagnetic powderFUJI PHOTO FILM CO LTD·Filed 1975·Granted Dec 13, 1977·49 cites·14 claims
- 0492US4253886ACorrosion resistant ferromagnetic metal powders and method of preparing the sameFUJI PHOTO FILM CO LTD·Filed 1977·Granted Mar 3, 1981·51 cites·76 claims
- 0590US4076861AMagnetic recording substanceFUJI PHOTO FILM CO LTD·Filed 1976·Granted Feb 28, 1978·38 cites·8 claims
- 0687US4857388AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1987·Granted Aug 15, 1989·34 cites·7 claims
- 0787US4197347AHigh density magnetic recording mediaFUJI PHOTO FILM CO LTD·Filed 1978·Granted Apr 8, 1980·28 cites·19 claims
- 0887US4069073AProcess for the production of a ferromagnetic metal powderFUJI PHOTO FILM CO LTD·Filed 1975·Granted Jan 17, 1978·27 cites·9 claims
- 0984US4135016AMagnetic recording materialFUJI PHOTO FILM CO LTD·Filed 1977·Granted Jan 16, 1979·34 cites·23 claims
- 1084US4096316AMethod of producing magnetic material with alkaline borohydridesFUJI PHOTO FILM CO LTD·Filed 1977·Granted Jun 20, 1978·35 cites·6 claims
- 1183US3968044AMilled liquid developerRANK XEROX LTD·Filed 1974·Granted Jul 6, 1976·18 cites·7 claims
- 1283US3966510AFerromagnetic powder for magnetic recording medium and method for preparation thereofFUJI PHOTO FILM CO LTD·Filed 1974·Granted Jun 29, 1976·28 cites·19 claims
- 1380US4246316AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1978·Granted Jan 20, 1981·29 cites·11 claims
- 1479US4308311AMagnetic recording materialFUJI PHOTO FILM CO LTD·Filed 1979·Granted Dec 29, 1981·19 cites·43 claims
- 1579US4141763AProcess for production of ferromagnetic powder and apparatus thereforFUJI PHOTO FILM CO LTD·Filed 1977·Granted Feb 27, 1979·21 cites·5 claims
- 1678US4847147AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1987·Granted Jul 11, 1989·32 cites·25 claims
- 1778US4108787AProcess for producing ferromagnetic iron oxideFUJI PHOTO FILM CO LTD·Filed 1975·Granted Aug 22, 1978·19 cites·3 claims
- 1876US4265931AProcess for the production of a magnetic recording memberFUJI PHOTO FILM CO LTD·Filed 1979·Granted May 5, 1981·17 cites·8 claims
- 1975US4101311AProcess for producing ferromagnetic metal powderFUJI PHOTO FILM CO LTD·Filed 1977·Granted Jul 18, 1978·18 cites·17 claims
- 2072US4446205AMagnetic recording tape having a leader tapeFUJI PHOTO FILM CO LTD·Filed 1982·Granted May 1, 1984·15 cites·11 claims
- 2169US4420540AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1982·Granted Dec 13, 1983·13 cites·7 claims
- 2267US4690857AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1985·Granted Sep 1, 1987·14 cites·13 claims
- 2367US4154895AMagnetic recording memberFUJI PHOTO FILM CO LTD·Filed 1977·Granted May 15, 1979·12 cites·9 claims
- 2467US4009111AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1975·Granted Feb 22, 1977·13 cites·6 claims
- 2566US4016057AProcess of producing ferromagnetic materialsFUJI PHOTO FILM CO LTD·Filed 1975·Granted Apr 5, 1977·12 cites·19 claims
- 2664US3943012AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1974·Granted Mar 9, 1976·10 cites·5 claims
- 2763US4743487AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1986·Granted May 10, 1988·12 cites·6 claims
- 2863US4217152AProcess for production of ferromagnetic powderFUJI PHOTO FILM CO LTD·Filed 1974·Granted Aug 12, 1980·15 cites·8 claims
- 2963US4110503AMagnetic recording membersFUJI PHOTO FILM CO LTD·Filed 1976·Granted Aug 29, 1978·15 cites·10 claims
- 3060US4320159AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1980·Granted Mar 16, 1982·16 cites·10 claims
- 3159US4201809AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1978·Granted May 6, 1980·13 cites·14 claims
- 3258US4820581AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1985·Granted Apr 11, 1989·15 cites·12 claims
- 3358US4511484AProcess for preparing magnetic coating compositionFUJI PHOTO FILM CO LTD·Filed 1983·Granted Apr 16, 1985·10 cites·13 claims
- 3458US4410565AMethod of making a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1982·Granted Oct 18, 1983·10 cites·13 claims
- 3557US4049871AMagnetic recording materialFUJI PHOTO FILM CO LTD·Filed 1976·Granted Sep 20, 1977·15 cites·9 claims
- 3657US4033890ALiquid developer for electrophotographyFUJI PHOTO FILM CO LTD·Filed 1975·Granted Jul 5, 1977·9 cites·10 claims
- 3757US4019993AManufacturing process for liquid developerFUJI PHOTO FILM CO LTD·Filed 1971·Granted Apr 26, 1977·7 cites·8 claims
- 3856US4071654AMagnetic recording memberFUJI PHOTO FILM CO LTD·Filed 1975·Granted Jan 31, 1978·12 cites·5 claims
- 3955US4135218AMagnetic recording and reproducing apparatusFUJI PHOTO FILM CO LTD·Filed 1976·Granted Jan 16, 1979·8 cites·6 claims
- 4055US3954467AElectrophotographic photosensitive materialFUJI PHOTO FILM CO LTD·Filed 1971·Granted May 4, 1976·8 cites·5 claims
- 4154US4710421AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1987·Granted Dec 1, 1987·15 cites·7 claims
- 4254US4492734AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1983·Granted Jan 8, 1985·7 cites·10 claims
- 4353US4780353AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1987·Granted Oct 25, 1988·8 cites·17 claims
- 4453US4604296AProcess for production of magnetic recording elementsFUJI PHOTO FILM CO LTD·Filed 1984·Granted Aug 5, 1986·7 cites·20 claims
- 4551US4354908AProcess for the production of magnetic recording membersFUJI PHOTO FILM CO LTD·Filed 1978·Granted Oct 19, 1982·7 cites·8 claims
- 4651US4309471AMagnetic audio-recording tapeFUJI PHOTO FILM CO LTD·Filed 1979·Granted Jan 5, 1982·6 cites·7 claims
- 4748US4007072AFerromagnetic metal powder comprising lead and method for making the sameFUJI PHOTO FILM CO LTD·Filed 1974·Granted Feb 8, 1977·8 cites·25 claims
- 4847US4781964AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1986·Granted Nov 1, 1988·6 cites·6 claims
- 4946US4409291AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1981·Granted Oct 11, 1983·5 cites·10 claims
- 5045US4164604ALeader or trailer tape for a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1977·Granted Aug 14, 1979·7 cites·16 claims
Showing the top 50 of 77 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →