Inventor · disambiguated record
Tadashi Yasunaga
Also filed as: YASUNAGA TADASHI
47 granted patents·10 pending applications·302 citations·filing 1985–2008
98Inventor score
Top patents by PatentIndex Score
57 records- 0191US6909563B2Master carrier for magnetic transferFUJI PHOTO FILM CO LTD·Filed 2002·Granted Jun 21, 2005·25 cites·4 claims
- 0277US7522362B2Amplitude servo pattern, magnetic recording medium and the manufacturing method, patterned magnetic transfer master substrate used in the manufacturing method, and magnetic recording/reproducing apparatusFUJIFILM CORP·Filed 2005·Granted Apr 21, 2009·3 cites·12 claims
- 0377US7193796B2Patterned master carrier for magnetic transfer, manufacturing method thereof, magnetic transfer method, recording medium, and magnetic recording and reproduction apparatusFUJI PHOTO FILM CO LTD·Filed 2004·Granted Mar 20, 2007·11 cites·22 claims
- 0475US6887593B2Master information carrier for magnetic transferFUJI PHOTO FILM CO LTD·Filed 2003·Granted May 3, 2005·10 cites·11 claims
- 0573US7149042B2Master carrier for magnetic transferFUJI PHOTO FILM CO LTD·Filed 2004·Granted Dec 12, 2006·7 cites·6 claims
- 0673US6816327B2Master information carrier for magnetic transfer and magnetic transfer methodFUJI PHOTO FILM CO LTD·Filed 2002·Granted Nov 9, 2004·8 cites·8 claims
- 0768US7187510B2Method of magnetic transfer to flexible mediumFUJI PHOTO FILM CO LTD·Filed 2002·Granted Mar 6, 2007·6 cites·19 claims
- 0867US5122389AVacuum evaporation method and apparatusFUJI PHOTO FILM CO LTD·Filed 1991·Granted Jun 16, 1992·26 cites·37 claims
- 0962US6950252B2Master carrier for magnetic transferFUJI PHOTO FILM CO LTD·Filed 2002·Granted Sep 27, 2005·8 cites·12 claims
- 1062US5489480AMagnetic recording medium and process for producing the sameFUJI PHOTO FILM CO LTD·Filed 1994·Granted Feb 6, 1996·13 cites·11 claims
- 1161US7054082B2Magnetic transfer method for a high-density magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 2002·Granted May 30, 2006·4 cites·12 claims
- 1261US5560995AMagnetic recording medium having a ferromagnetic metal thin film upon which is coated a phosphorous and fluorine containing compositionFUJI PHOTO FILM CO LTD·Filed 1995·Granted Oct 1, 1996·15 cites·4 claims
- 1359US6911270B2Master information carrier for magnetic transferFUJI PHOTO FILM CO LTD·Filed 2002·Granted Jun 28, 2005·3 cites·9 claims
- 1459US5556707AMagnetic recording medium having a lubricant comprising a phosphoric acid monoester and a fluorocarboxylic acid esterFUJI PHOTO FILM CO LTD·Filed 1995·Granted Sep 17, 1996·14 cites·5 claims
- 1557US7094481B2Master information carrier for magnetic transfer and magnetic transfer methodFUJI PHOTO FILM CO LTD·Filed 2004·Granted Aug 22, 2006·2 cites·10 claims
- 1656US7477463B2Master information carrier for magnetic transferFUJIFILM CORP·Filed 2004·Granted Jan 13, 2009·2 cites·4 claims
- 1756US4876113AMethod for producing magnetic recording mediaFUJI PHOTO FILM CO LTD·Filed 1988·Granted Oct 24, 1989·9 cites·17 claims
- 1855US7465383B2Master information carrier for magnetic transfer and its production methodFUJIFILM CORP·Filed 2005·Granted Dec 16, 2008·0 cites·7 claims
- 1955US4983421AMethod for producing magnetic recording mediaFUJI PHOTO FILM CO LTD·Filed 1989·Granted Jan 8, 1991·9 cites·15 claims
- 2054US6906877B2Magnetic transfer method for a high-density magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 2002·Granted Jun 14, 2005·2 cites·9 claims
- 2154US5405689AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1993·Granted Apr 11, 1995·9 cites·17 claims
- 2254US5123376AApparatus for manufacturing magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1991·Granted Jun 23, 1992·10 cites·12 claims
- 2354US4988535AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1988·Granted Jan 29, 1991·7 cites·2 claims
- 2453US7365926B2Signal processing method of magnetic recording medium and magnetic record reproduction apparatusFUJIFILM CORP·Filed 2005·Granted Apr 29, 2008·0 cites·20 claims
- 2553US2009039560A1Apparatus and method for manufacturing magnetic recording mediumFUJIFILM CORP·Filed 2008·Application pending·0 cites
- 2653US2008316649A1Method for producing magnetic recording medium, magnetic recording medium produced by the production method, and mold structure for use in the production methodFUJIFILM CORP·Filed 2008·Application pending·0 cites
- 2752US4713262AManufacturing method for a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1986·Granted Dec 15, 1987·8 cites·19 claims
- 2851US7359133B2Magnetic recording medium and drive apparatus thereforFUJIFILM CORP·Filed 2002·Granted Apr 15, 2008·1 cites·13 claims
- 2950US4990361AMethod for producing magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1989·Granted Feb 5, 1991·7 cites·15 claims
- 3050US2008239533A1Method of magnetic transfer and magnetic recording mediumFUJIFILM CORP·Filed 2008·Application pending·0 cites
- 3150US2008062548A1Master recording medium, magnetic transfer method, magnetic transfer apparatus, and magnetic recording medium and magnetic recording and reproducing apparatus thereby madeFUJIFILM CORP·Filed 2007·Application pending·0 cites
- 3249US5334413AMethod for preparing a magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1992·Granted Aug 2, 1994·7 cites·6 claims
- 3349US5322733AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1991·Granted Jun 21, 1994·7 cites·7 claims
- 3449US2007217047A1Master medium for perpendicular magnetic transfer, method of perpendicular magnetic transfer, perpendicular magnetic recording medium and perpendicular magnetic recording apparatusFUJITSU LTD·Filed 2007·Application pending·0 cites
- 3549US2009002886A1Method for producing magnetic recording medium, magnetic recording medium produced by the production method, and mold structure for use in the production methodFUJIFILM CORP·Filed 2008·Application pending·0 cites
- 3647US4935605AApparatus for correcting curl of magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1988·Granted Jun 19, 1990·6 cites·11 claims
- 3746US2004180174A1Master information carrier for magnetic transfer and its production methodFUJI PHOTO FILM CO LTD·Filed 2004·Application pending·0 cites
- 3846US2006082913A1Patterned master carrier for magnetic transfer, magnetic recording medium, and magnetic recording/reproducing apparatusFUJI PHOTO FILM CO LTD·Filed 2005·Application pending·0 cites
- 3945US2005277000A1Process for producing magnetic recording medium with limited coercivity squareness ratioFUJI PHOTO FILM CO LTD·Filed 2005·Application pending·0 cites
- 4044US4801500AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1987·Granted Jan 31, 1989·9 cites·7 claims
- 4144US4673610AMagnetic recording medium having iron nitride recording layerFUJI PHOTO FILM CO LTD·Filed 1985·Granted Jun 16, 1987·9 cites·7 claims
- 4244US2005213235A1Magnetic recording medium, method of producing the magnetic recording medium, patterned master carrier for magnetic transfer employed during production of the magnetic recording medium, and magnetic recording/reproducing apparatusFUJI PHOTO FILM CO LTD·Filed 2005·Application pending·0 cites
- 4343US4702938AProcess for producing magnetic recording materialFUJI PHOTO FILM CO LTD·Filed 1986·Granted Oct 27, 1987·4 cites·4 claims
- 4442US5492764AMagnetic recording medium having a protective layer containing a tetrazaindene or thiouracil cyclic compound and a fluorine compoundFUJI PHOTO FILM CO LTD·Filed 1994·Granted Feb 20, 1996·4 cites·8 claims
- 4541US5503943AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1994·Granted Apr 2, 1996·4 cites·4 claims
- 4640US4873154AMagnetic recording medium containing Fe, Co, N and OFUJI PHOTO FILM CO LTD·Filed 1988·Granted Oct 10, 1989·7 cites·3 claims
- 4739US5114778AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1988·Granted May 19, 1992·6 cites·3 claims
- 4838US4885189AMethod of producing magnetic recording mediaFUJI PHOTO FILM CO LTD·Filed 1987·Granted Dec 5, 1989·3 cites·12 claims
- 4936US5112669AMagnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1990·Granted May 12, 1992·6 cites·17 claims
- 5036US4948626AMethod for producing thin-film magnetic recording mediumFUJI PHOTO FILM CO LTD·Filed 1989·Granted Aug 14, 1990·3 cites·8 claims
Showing the top 50 of 57 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →