Inventor
KATAYAMA HIROYUKI
JP186 patents
⚠️ This page may combine multiple inventors who share the name “KATAYAMA HIROYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SHARP KK
40 patentsUS5414652AMay 9, 1995
Magneto-optical memory element
SHARP KK137 citations98
US6327227B1Dec 4, 2001
Magnetic recorder/reproduction apparatus including a selective temperature controller and magnetic recording reproduction method including selective temperature control
SHARP KK22 citations93
US5674583AOct 7, 1997
Optical recording medium and manufacturing method thereof
SHARP KK31 citations93
US5644566AJul 1, 1997
Magneto-optical recording medium
SHARP KK44 citations93
US5428585AJun 27, 1995
Magneto-optical recording medium comprising first, second and third magnetic layers and method of recording on same
SHARP KK40 citations93
US5386400AJan 31, 1995
Magneto-optical head device having a lubricated member
SHARP KK33 citations93
US5338646AAug 16, 1994
Optical memory device having an improved light reflection or optical memory layer
SHARP KK20 citations93
US5278810AJan 11, 1994
Magneto-optical recording medium whereon recording is carried out with an overwriting function
SHARP KK55 citations93
US5233597AAug 3, 1993
Magneto-optical disk having a layer of varying thickness
SHARP KK34 citations93
US5231613AJul 27, 1993
Magneto-optical recording device
SHARP KK27 citations93
US5224068AJun 29, 1993
Recording method for magneto-optic memory medium
SHARP KK23 citations93
US5088086AFeb 11, 1992
Optical recording medium and the method of recording, reading, and erasing information using it
SHARP KK22 citations93
US4956243ASep 11, 1990
Optical memory element
SHARP KK26 citations93
US4917751AApr 17, 1990
Method of producing double sided optical memory disks
SHARP KK29 citations93
US4610912ASep 9, 1986
Magneto-optic memory element
SHARP KK31 citations93
US6687195B2Feb 3, 2004
Magnetic recording head and magnetic recording device
SHARP KK29 citations92
US6603619B1Aug 5, 2003
Magnetic storage medium and heat assisted recording and reproduction method
SHARP KK45 citations92
US5087535AFeb 11, 1992
Method of manufacturing photo-mask and photo-mask manufactured thereby
SHARP KK27 citations92
US6400654B1Jun 4, 2002
Magneto-optical recording and reproducing device capable of suppressing cross talk
SHARP KK36 citations91
US4740947AApr 26, 1988
Dual surface optical memory disc
SHARP KK25 citations91
US6367924B1Apr 9, 2002
Thermally assisted magnetic recording medium
SHARP KK14 citations84
US5767891AJun 16, 1998
Method of manufacturing an optical probe element
SHARP KK14 citations82
US5680376AOct 21, 1997
Optical recording medium, and apparatus and method for recording and reproducing information on the same
SHARP KK16 citations82
US5170390ADec 8, 1992
Optical recording element and driving system
SHARP KK14 citations82
US5068841ANov 26, 1991
Magneto-optical recording/reproducing device
SHARP KK21 citations82
US4717628AJan 5, 1988
Magnetooptical storage element
SHARP KK20 citations82
US5252988AOct 12, 1993
Thermal head for thermal recording machine
SHARP KK20 citations80
US6876603B2Apr 5, 2005
Information write/read head including an optical slit having a light emitting section whose width is shorter than a light beam diffraction limit
SHARP KK11 citations74
US6816334B2Nov 9, 2004
Information recording and reproducing device and tracking servo system therefor
SHARP KK11 citations74
US6667146B1Dec 23, 2003
Optical recording medium and reproducing method therefor
SHARP KK9 citations74
US5989671ANov 23, 1999
Optical recording medium and manufacturing method thereof
SHARP KK10 citations74
US5982409ANov 9, 1999
Optical probe element, and a recording and reproduction device using the optical probe element
SHARP KK5 citations74
US5863649AJan 26, 1999
Magneto-optical recording medium
SHARP KK7 citations74
US5738765AApr 14, 1998
Magneto-optic memory device
SHARP KK6 citations74
US5707727AJan 13, 1998
Magneto-optical recording medium
SHARP KK15 citations74
US5705286AJan 6, 1998
Magneto-optical recording medium
SHARP KK10 citations74
US5691963ANov 25, 1997
Magneto-optical recording device using light-modulated technic without an initial magnetic field
SHARP KK15 citations74
US5662988ASep 2, 1997
Magneto-optical recording medium
SHARP KK16 citations74
US5648162AJul 15, 1997
Magneto-optical recording medium and a method of recording and/or reproducing using the same
SHARP KK15 citations74
US5638111AJun 10, 1997
Optical probe element, and a recording and reproduction device using the optical probe element
SHARP KK7 citations74
NIPPON STEEL CORP
2 patentsMITSUBISHI HEAVY IND LTD
1 patentSHAP KABUSHIKI KAISHA
1 patentAGENCY IND SCIENCE TECHN
1 patentSUMITOMO RUBBER IND
1 patentMITSUI CHEMICALS INC
1 patentNITTO DENKO CORP
1 patentYAZAKI CORP
1 patentMITANI MUNEHISA
1 patentShowing the top 50 of 186 patents by PatentIndex Score.