Inventor · disambiguated record
Ryoichi Hiratsuka
Also filed as: HIRATSUKA RYOICHI
15 granted patents·4 pending applications·80 citations·filing 1996–2019
90Inventor score
Top patents by PatentIndex Score
19 records- 0182US6319325B1Apparatus for producing thin film, process for producing thin film and guide rollerSONY CORP·Filed 2000·Granted Nov 20, 2001·31 cites·10 claims
- 0264US9607813B2Magnetic field generation apparatus and sputtering apparatusSONY CORP·Filed 2014·Granted Mar 28, 2017·1 cites·15 claims
- 0361US6110584AMagnetic recording mediumSONY CORP·Filed 1998·Granted Aug 29, 2000·15 cites·4 claims
- 0458US5945219AMagnetic recording medium and method for producing sameSONY CORP·Filed 1996·Granted Aug 31, 1999·12 cites·30 claims
- 0554US6447652B1Thin-film forming method and thin-film forming apparatusSONY CORP·Filed 1999·Granted Sep 10, 2002·11 cites·21 claims
- 0653US6999278B2Cleaning tape with surface protrusions formed by particles of predetermined size/density and non-magnetic metal evaporated film of predetermined thicknessSONY CORP·Filed 2003·Granted Feb 14, 2006·2 cites·15 claims
- 0753US6800374B2Cleaning tapeSONY CORP·Filed 2002·Granted Oct 5, 2004·5 cites·28 claims
- 0851US7449221B2Metallic thin film type magnetic recording medium and method of manufacturing thereofSONY CORP·Filed 2006·Granted Nov 11, 2008·0 cites·2 claims
- 0949US7531251B2Magnetic recording mediumSONY CORP·Filed 2006·Granted May 12, 2009·0 cites·5 claims
- 1047US11621020B2Magnetic recording mediumSONY CORP·Filed 2018·Granted Apr 4, 2023·0 cites·15 claims
- 1145US11468910B2Magnetic recording medium having reinforced substrateSONY CORP·Filed 2019·Granted Oct 11, 2022·0 cites·9 claims
- 1245US7214436B2Magnetic recording medium and process for producing sameSONY CORP·Filed 2003·Granted May 8, 2007·1 cites·1 claims
- 1344US11423936B2Magnetic recording medium and method of producing the sameSONY CORP·Filed 2014·Granted Aug 23, 2022·0 cites·15 claims
- 1444US2013089665A1Self-limiting reaction deposition apparatus and self-limiting reaction deposition methodTAKENAKA HIROYA·Filed 2012·Application pending·0 cites
- 1539US7070871B2Metallic thin film type magnetic recording medium and method of manufacturing thereofSONY CORP·Filed 2002·Granted Jul 4, 2006·0 cites·5 claims
- 1639US2003217698A1Plasma chemical vapor deposition apparatusFiled 2003·Application pending·0 cites
- 1738US2022084550A1Magnetic recording tape and magnetic recording tape cartridgeSONY GROUP CORP·Filed 2019·Application pending·0 cites
- 1838US2020411044A1Magnetic recording tape, method of producing the same, and magnetic recording tape cartridgeSONY CORP·Filed 2018·Application pending·0 cites
- 1935US5968609AMagnetic recording medium and method for producing sameSONY CORP·Filed 1998·Granted Oct 19, 1999·2 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →