Inventor
OKA NOBUYUKI
JP24 patents
⚠️ This page may combine multiple inventors who share the name “OKA NOBUYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
6 patentsUS5095470AMar 10, 1992
Capacitance detection control circuit for positioning a magnetic head close to a magneto-optical disk
SONY CORP45 citations94
US5487047AJan 23, 1996
Magnetooptical recording apparatus for recording information in a lead-in region of a recording medium
SONY CORP53 citations92
US5463602AOct 31, 1995
Reproducing apparatus which can play multiple types of discs and biases focusing error signal based on disc type
SONY CORP26 citations91
US5495456AFeb 27, 1996
Magneto-optical recording and reproducing apparatus having a laser driving circuit which superimposes a signal having a frequency at least double the maximum recording signal frequency
SONY CORP22 citations89
US5168483ADec 1, 1992
Magnetic head position control apparatus including drive means responsive to a summed signal from a capacitance detection electrode and a disk size detector means
SONY CORP15 citations72
US5111441AMay 5, 1992
Apparatus for generating magnetic field varying in response to an information signal
SONY CORP2 citations61
NOK CORP
4 patentsMARUZEN PETROCHEM CO LTD
4 patentsUS6462158B1Oct 8, 2002
Polymerizable compounds having norbornanelactone structure and polymers
MARUZEN PETROCHEM CO LTD27 citations92
US6461788B1Oct 8, 2002
Polymerizable compounds having cyclohexanelactone structure and polymers
MARUZEN PETROCHEM CO LTD14 citations84
US5959051ASep 28, 1999
Process for preparing vinylphenol polymers and stabilized compositions of vinylphenol-containing polymerization raw material
MARUZEN PETROCHEM CO LTD8 citations74
US6258901B1Jul 10, 2001
Process for producing lightly colored p-vinylphenol polymer
MARUZEN PETROCHEM CO LTD6 citations58
HITACHI LTD
3 patentsUS6886084B2Apr 26, 2005
Storage controlling device and control method for a storage controlling device
HITACHI LTD41 citations92
US7240241B2Jul 3, 2007
Backup method and storage control device using the same
HITACHI LTD9 citations73
US7080219B2Jul 18, 2006
Storage controlling device and control method for a storage controlling device
HITACHI LTD0 citations51