P

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 patents
US5414652AMay 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 patents

MITSUBISHI HEAVY IND LTD

1 patent

SHAP KABUSHIKI KAISHA

1 patent

AGENCY IND SCIENCE TECHN

1 patent

SUMITOMO RUBBER IND

1 patent

MITSUI CHEMICALS INC

1 patent

NITTO DENKO CORP

1 patent

YAZAKI CORP

1 patent

MITANI MUNEHISA

1 patent

Showing the top 50 of 186 patents by PatentIndex Score.