Inventor
TANAKA TOMIJI
JP25 patents
⚠️ This page may combine multiple inventors who share the name “TANAKA TOMIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
20 patentsUS4955007ASep 4, 1990
Thermomagnetic recording method applying power modulated laser on a magnetically coupled double layer structure of perpendicular anisotropy film
SONY CORP26 citations92
US4878132AOct 31, 1989
Thermomagnetic recording method applying power modulated laser on a magnetically coupled multi-layer structure of perpendicular anisotropy magnetic film
SONY CORP43 citations92
US4670356AJun 2, 1987
Magneto-optical recording medium and method of making same
SONY CORP40 citations92
US4576699AMar 18, 1986
Magneto-optical recording medium and method of making same
SONY CORP30 citations92
US6487164B1Nov 26, 2002
Optical recording medium capable of assuring sufficient levels of signals required for reading/writing data, and stamper for manufacture of the same
SONY CORP27 citations91
US7236442B2Jun 26, 2007
Holographic recording/reproducing apparatus and reproducing apparatus for holographically recorded information
SONY CORP11 citations84
US7502151B2Mar 10, 2009
Holographic recording and reconstructing apparatus and method
SONY CORP16 citations83
US7729400B2Jun 1, 2010
External cavity type semiconductor laser
SONY CORP2 citations63
US6934244B2Aug 23, 2005
Optical recording medium and stamper for manufacturing the same
SONY CORP6 citations63
US7808876B2Oct 5, 2010
Hologram recording/reconstructing apparatus
SONY CORP5 citations62
US7310173B2Dec 18, 2007
Hologram recording method, hologram recording reproduction method, hologram recording device, hologram recording/reproduction device and hologram reproduction device
SONY CORP2 citations62
US7085028B2Aug 1, 2006
Hologram recording apparatus, hologram recording method, and hologram recording medium
SONY CORP4 citations62
US7366221B2Apr 29, 2008
Laser apparatus and method of driving diffraction grating
SONY CORP4 citations61
US7889407B2Feb 15, 2011
Method for producing a duplicate hologram recording medium, apparatus for producing a duplication master, apparatus for producing a duplicate hologram recording medium, and duplication master
SONY CORP4 citations59
US7580433B2Aug 25, 2009
Laser system
SONY CORP4 citations57
US7969846B2Jun 28, 2011
Hologram recording and reproducing device and method for recording hologram
SONY CORP0 citations52
US7426222B2Sep 16, 2008
Laser apparatus
SONY CORP1 citations49
US7570678B2Aug 4, 2009
Wavelength determining apparatus, wavelength determining method, semiconductor laser controlling apparatus, and semiconductor laser controlling method
SONY CORP0 citations41
US7110328B2Sep 19, 2006
Recording and reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium
SONY CORP0 citations41
US7065023B2Jun 20, 2006
Light spot advancing direction judging device and method, optical head device control device and method, and optical disk recording/reproducing device
SONY CORP0 citations41