Inventor · disambiguated record
Ryuji Shirahata
Also filed as: AMARI HIROSHI · SHIRAHATA RYUJI · SUZUKI MASAAKI
56 granted patents·751 citations·filing 1974–1996
99Inventor score
Files withFUJI PHOTO FILM CO LTD56
Top patents by PatentIndex Score
56 records- 0195US4260466AMethod of producing magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1977·Granted Apr 7, 1981·46 cites·19 claims
- 0294US3993824ARecording member comprising a substrate with a magnetic lager on one surface and a lubricating lager on the opposed surfaceFUJI PHOTO FILM CO LTD·Filed 1975·Granted Nov 23, 1976·44 cites·10 claims
- 0393US4582746AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1984·Granted Apr 15, 1986·41 cites·5 claims
- 0491US4087582AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1974·Granted May 2, 1978·30 cites·6 claims
- 0588US4072781AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1975·Granted Feb 7, 1978·39 cites·7 claims
- 0687US4333985AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1981·Granted Jun 8, 1982·28 cites·3 claims
- 0785US4588656AMethod of preparing a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1982·Granted May 13, 1986·25 cites·14 claims
- 0880US4511594ASystem of manufacturing magnetic recording mediaFUJI PHOTO FILM CO LTD·Filed 1983·Granted Apr 16, 1985·21 cites·12 claims
- 0980US4128691AProcess for the production of a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1976·Granted Dec 5, 1978·21 cites·8 claims
- 1080US4089993AMethod of forming a metallic thin film by electroless plating on a vinylidene chloride undercoatFUJI PHOTO FILM CO LTD·Filed 1976·Granted May 16, 1978·26 cites·12 claims
- 1179US4403002AVacuum evaporating apparatusFUJI PHOTO FILM CO LTD·Filed 1982·Granted Sep 6, 1983·17 cites·9 claims
- 1277US4250225AProcess for the production of a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1978·Granted Feb 10, 1981·26 cites·4 claims
- 1377US4153920ARecording method employing a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1977·Granted May 8, 1979·17 cites·11 claims
- 1476US4414271AMagnetic recording medium and method of preparation thereofFUJI PHOTO FILM CO LTD·Filed 1982·Granted Nov 8, 1983·17 cites·21 claims
- 1574US4578311AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1984·Granted Mar 25, 1986·27 cites·5 claims
- 1673US4226681AProcess for the production of a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1978·Granted Oct 7, 1980·14 cites·8 claims
- 1773US4172171AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1977·Granted Oct 23, 1979·16 cites·16 claims
- 1869US4477489AMethod of making magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1982·Granted Oct 16, 1984·14 cites·3 claims
- 1967US4690857AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1985·Granted Sep 1, 1987·14 cites·13 claims
- 2066US4661418AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1982·Granted Apr 28, 1987·18 cites·11 claims
- 2161US5825429AApparatus and method for generating interpolated image dataFUJI PHOTO FILM CO LTD·Filed 1996·Granted Oct 20, 1998·25 cites·19 claims
- 2261US4474832AMagnetic recording mediaFUJI PHOTO FILM CO LTD·Filed 1983·Granted Oct 2, 1984·10 cites·8 claims
- 2359US4448843AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1981·Granted May 15, 1984·9 cites·9 claims
- 2458US4601912AMethod of preparing a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1985·Granted Jul 22, 1986·10 cites·5 claims
- 2558US4410565AMethod of making a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1982·Granted Oct 18, 1983·10 cites·13 claims
- 2658US4286299AMagnetic head assembly for recording or reproducing vertically magnetized recordsFUJI PHOTO FILM CO LTD·Filed 1979·Granted Aug 25, 1981·8 cites·4 claims
- 2757US4622271AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1985·Granted Nov 11, 1986·10 cites·18 claims
- 2857US4604293AProcess for producing magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1985·Granted Aug 5, 1986·10 cites·9 claims
- 2956US4643915AProcess for producing magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1985·Granted Feb 17, 1987·9 cites·6 claims
- 3055US4652460AProcess for preparing magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1986·Granted Mar 24, 1987·9 cites·10 claims
- 3155US4002546AMethod for producing a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1975·Granted Jan 11, 1977·11 cites·6 claims
- 3254US4988535AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1988·Granted Jan 29, 1991·7 cites·2 claims
- 3352US4713262AManufacturing method for a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1986·Granted Dec 15, 1987·8 cites·19 claims
- 3452US4412507AMagnetic recording medium manufacturing deviceFUJI PHOTO FILM CO LTD·Filed 1981·Granted Nov 1, 1983·7 cites·9 claims
- 3551US4354908AProcess for the production of magnetic recording membersFUJI PHOTO FILM CO LTD·Filed 1978·Granted Oct 19, 1982·7 cites·8 claims
- 3650US4700198AProcess for recording information by irradiation of, an deposition on, a substrateFUJI PHOTO FILM CO LTD·Filed 1985·Granted Oct 13, 1987·7 cites·4 claims
- 3748US4097650AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1976·Granted Jun 27, 1978·8 cites·11 claims
- 3847US4557948AProcess for producing magnetic recording materialsFUJI PHOTO FILM CO LTD·Filed 1984·Granted Dec 10, 1985·5 cites·11 claims
- 3946US4454836AVacuum evaporating apparatus utilizing multiple rotatable cansFUJI PHOTO FILM CO LTD·Filed 1983·Granted Jun 19, 1984·4 cites·4 claims
- 4044US4673610AMagnetic recording medium having iron nitride recording layerFUJI PHOTO FILM CO LTD·Filed 1985·Granted Jun 16, 1987·9 cites·7 claims
- 4144US4626315AProcess of forming ultrafine patternFUJI PHOTO FILM CO LTD·Filed 1985·Granted Dec 2, 1986·12 cites·10 claims
- 4244US4600638AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1984·Granted Jul 15, 1986·8 cites·16 claims
- 4343US4702938AProcess for producing magnetic recording materialFUJI PHOTO FILM CO LTD·Filed 1986·Granted Oct 27, 1987·4 cites·4 claims
- 4443US4503119AMagnetic recording mediaFUJI PHOTO FILM CO LTD·Filed 1981·Granted Mar 5, 1985·4 cites·11 claims
- 4543US4086374AProduction of magnetic recording materialFUJI PHOTO FILM CO LTD·Filed 1976·Granted Apr 25, 1978·5 cites·14 claims
- 4640US5547704AMethod for producing a magnetic diskFUJI PHOTO FILM CO LTD·Filed 1994·Granted Aug 20, 1996·4 cites·9 claims
- 4740US4588636AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1982·Granted May 13, 1986·3 cites·6 claims
- 4839US4446816AApparatus for manufacturing a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1983·Granted May 8, 1984·4 cites·16 claims
- 4938US4885189AMethod of producing magnetic recording mediaFUJI PHOTO FILM CO LTD·Filed 1987·Granted Dec 5, 1989·3 cites·12 claims
- 5035US4724156AMethod of manufacturing magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1986·Granted Feb 9, 1988·2 cites·1 claims
Showing the top 50 of 56 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Ryuji Shirahata 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 →