Inventor
SOFUE MASAAKI
JP13 patents
⚠️ This page may combine multiple inventors who share the name “SOFUE MASAAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
10 patentsUS5086422AFeb 4, 1992
Optical disk apparatus
RICOH KK64 citations94
US5668793ASep 16, 1997
Disk cartridge driving apparatus
RICOH KK8 citations73
US5392274AFeb 21, 1995
Optical pickup device
RICOH KK11 citations72
US5991251ANov 23, 1999
Method and apparatus for changing laser beam power of an optical storage device for various types of compact disks
RICOH KK16 citations68
US6128259AOct 3, 2000
Optical pickup apparatus for accurate detection of a tracking error signal
RICOH KK11 citations67
US6147947ANov 14, 2000
Optical disk apparatus for accessing optical disks with different substrate thicknesses
RICOH KK5 citations61
US5926451AJul 20, 1999
Optical disk unit having reduced wobble
RICOH KK6 citations61
US5875155AFeb 23, 1999
Optical disk unit having reduced recording and reproducing errors
RICOH KK6 citations61
US5737292AApr 7, 1998
Optical data recording/reproducing device
RICOH KK4 citations61
US6353583B1Mar 5, 2002
Signal operational circuit for a multi-beam pick-up device
RICOH KK5 citations56
SAMSUNG ELECTRONICS CO LTD
3 patentsUS8928220B2Jan 6, 2015
White light emitting device and display apparatus
SAMSUNG ELECTRONICS CO LTD9 citations83
US9190583B2Nov 17, 2015
White light emitting device and display apparatus
SAMSUNG ELECTRONICS CO LTD0 citations51
US9548426B2Jan 17, 2017
Semiconductor light-emitting device
SAMSUNG ELECTRONICS CO LTD1 citations50