Inventor · disambiguated record
Teiichiro Umezawa
Also filed as: UMEZAWA TEIICHIRO
30 granted patents·11 pending applications·1,464 citations·filing 2000–2022
98Inventor score
Files withHOYA CORP14UMEZAWA TEIICHIRO7WD MEDIA SINGAPORE PTE LTD6HOYA MAGNETICS SINGAPORE PTE5AYAMA KENJI2
Top patents by PatentIndex Score
41 records- 0198US7833639B2Magnetic recording medium and method for manufacturing magnetic recording mediumWD MEDIA SINGAPORE PTE LTD·Filed 2007·Granted Nov 16, 2010·81 cites·6 claims
- 0298US7208236B2Magnetic recording medium with multi-portion carbon-based protection layer, and apparatus thereofHOYA MAGNETICS SINGAPORE PTE·Filed 2005·Granted Apr 24, 2007·75 cites·9 claims
- 0397US8623528B2Method of manufacturing perpendicular magnetic recording medium and perpendicular magnetic recording mediumUMEZAWA TEIICHIRO·Filed 2009·Granted Jan 7, 2014·73 cites·2 claims
- 0497US8546000B2Perpendicular magnetic discUMEZAWA TEIICHIRO·Filed 2011·Granted Oct 1, 2013·69 cites·6 claims
- 0597US8367228B2Magnetic recording medium having patterned auxiliary recording layer and method for manufacturing such magnetic recording mediumWD MEDIA SINGAPORE PTE LTD·Filed 2010·Granted Feb 5, 2013·74 cites·5 claims
- 0697US8309239B2Perpendicular magnetic recording medium and method of manufacturing the sameUMEZAWA TEIICHIRO·Filed 2008·Granted Nov 13, 2012·69 cites·7 claims
- 0797US8142916B2Magnetic recording mediumUMEZAWA TEIICHIRO·Filed 2008·Granted Mar 27, 2012·72 cites·11 claims
- 0897US7983003B2Magnetic recording medium having soft magnetic layer and perpendicular magnetic recording layerWD MEDIA SINGAPORE PTE LTD·Filed 2006·Granted Jul 19, 2011·69 cites·5 claims
- 0997US7955723B2Magnetic recording medium substrate and perpendicular magnetic recording mediumWD MEDIA SINGAPORE PTE LTD·Filed 2006·Granted Jun 7, 2011·69 cites·13 claims
- 1097US7420886B2Magnetic recording medium, and thermal stability measuring method and apparatus of magnetic recording mediumHOYA CORP·Filed 2007·Granted Sep 2, 2008·70 cites·3 claims
- 1196US8795857B2Perpendicular magnetic recording medium and manufacturing method of the sameAYAMA KENJI·Filed 2008·Granted Aug 5, 2014·51 cites·5 claims
- 1296US8057926B2Perpendicular magnetic recording mediumAYAMA KENJI·Filed 2008·Granted Nov 15, 2011·70 cites·5 claims
- 1396US8003237B2Perpendicular magnetic recording disk and manufacturing method thereofWD MEDIA INC·Filed 2006·Granted Aug 23, 2011·72 cites·13 claims
- 1496US7220500B1Magnetic recording medium, and thermal stability measuring method and apparatus of magnetic recording mediumHOYA CORP·Filed 2000·Granted May 22, 2007·76 cites·21 claims
- 1596US6946191B2Magnetic recording mediumHOYA MAGNETICS SINGAPORE PTE·Filed 2003·Granted Sep 20, 2005·73 cites·11 claims
- 1696US6916558B2Magnetic disk using a glass substrateHOYA MAGNETICS SINGAPORE PTE·Filed 2004·Granted Jul 12, 2005·76 cites·4 claims
- 1796US6759138B2Antiferromagnetically coupled magnetic recording medium with dual-layered upper magnetic layerHOYA CORP·Filed 2002·Granted Jul 6, 2004·94 cites·12 claims
- 1894US7169487B2Magnetic recording mediumHOYA MAGNETICS SINGAPORE PTE·Filed 2002·Granted Jan 30, 2007·70 cites·22 claims
- 1993US8603650B2Perpendicular magnetic recording disk and manufacturing method thereofSONOBE YOSHIAKI·Filed 2005·Granted Dec 10, 2013·69 cites·10 claims
- 2090US6670055B2Magnetic recording medium and manufacturing method thereforHOYA CORP·Filed 2001·Granted Dec 30, 2003·87 cites·9 claims
- 2176US9159351B2Perpendicular magnetic recording medium and method of manufacturing the sameSAKAMOTO KAZUAKI·Filed 2008·Granted Oct 13, 2015·3 cites·11 claims
- 2273US9005699B2Method for manufacturing magnetic recording mediumSONOBE YOSHIAKI·Filed 2007·Granted Apr 14, 2015·2 cites·6 claims
- 2363US9064518B2Perpendicular magnetic recording mediumONOUE TAKAHIRO·Filed 2009·Granted Jun 23, 2015·0 cites·9 claims
- 2460US2024377719A1Substrate with multilayer reflective film reflective mask blank, reflective mask, and method for manufacturing semiconductor deviceHOYA CORP·Filed 2022·Application pending·0 cites
- 2560US2025370324A1Multilayer reflective film-attached substrate, reflective mask blank, reflective mask, and method for manufacturing semiconductor deviceHOYA CORP·Filed 2022·Application pending·0 cites
- 2658US9470971B2Mask blank, transfer mask, and methods of manufacturing the sameHOYA CORP·Filed 2013·Granted Oct 18, 2016·0 cites·7 claims
- 2758US2024231214A9Substrate with multilayer reflective film, reflective mask blank, reflective mask, and method for manufacturing semiconductor deviceHOYA CORP·Filed 2022·Application pending·0 cites
- 2857US9946153B2Mask blank and transfer maskHOYA CORP·Filed 2016·Granted Apr 17, 2018·0 cites·7 claims
- 2955US8697261B2Perpendicular magnetic recording mediumUMEZAWA TEIICHIRO·Filed 2009·Granted Apr 15, 2014·0 cites·7 claims
- 3054US8871368B2Perpendicular magnetic recording medium and process for manufacture thereofONOUE TAKAHIRO·Filed 2009·Granted Oct 28, 2014·0 cites·13 claims
- 3150US2011244119A1Perpendicular magnetic recording medium and method of manufacturing the sameWD MEDIA SINGAPORE PTE LTD·Filed 2011·Application pending·0 cites
- 3247US2009191331A1Perpendicular magnetic recording medium manufacturing methodHOYA CORP·Filed 2007·Application pending·0 cites
- 3347US2009117408A1Perpendicular magnetic recording disk and method of manufacturing the sameHOYA CORP·Filed 2007·Application pending·0 cites
- 3445US7081308B2Magnetic recording mediumHOYA MAGNETICS SINGAPORE PTE·Filed 2004·Granted Jul 25, 2006·0 cites·4 claims
- 3543US9349404B2Perpendicular magnetic recording discUMEZAWA TEIICHIRO·Filed 2011·Granted May 24, 2016·0 cites·7 claims
- 3643US2015262602A1Perpendicular magnetic recording mediumWD MEDIA SINGAPORE PTE LTD·Filed 2015·Application pending·0 cites
- 3742US2003108774A1Magnetic recording mediumHOYA CORP·Filed 2002·Application pending·0 cites
- 3841US2004213949A1Magnetic disk and method of producing the sameHOYA CORP HOYA MAGNETICS SINGA·Filed 2004·Application pending·0 cites
- 3940US9240204B2Perpendicular magnetic recording discUMEZAWA TEIICHIRO·Filed 2011·Granted Jan 19, 2016·0 cites·7 claims
- 4040US2003203244A1Magnetic recording medium and method of producing the sameHOYA CORP·Filed 2003·Application pending·0 cites
- 4139US2003096140A1Magnetic recording mediumHOYA CORP·Filed 2002·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →