Inventor
TEZUKA MASARU
JP11 patents
⚠️ This page may combine multiple inventors who share the name “TEZUKA MASARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
10 patentsUS5625616AApr 29, 1997
Deterioration estimating method for a light emitting device and a light emission driving apparatus using the method
SONY CORP71 citations95
US5206850AApr 27, 1993
Optically writable record of digital information and recording apparatus therefor
SONY CORP38 citations92
US7177259B2Feb 13, 2007
Optical head and optical recording medium drive device
SONY CORP36 citations91
US5291467AMar 1, 1994
Disc recording apparatus for recording a signal without losing the signal during an occurrence of a track jump
SONY CORP36 citations91
US7283730B1Oct 16, 2007
Optical disc camcorder
SONY CORP7 citations73
US5257271AOct 26, 1993
Sample data transmission apparatus
SONY CORP16 citations73
US4167764ASep 11, 1979
Mode changing apparatus in a tape recorder
SONY CORP17 citations72
US5239529AAug 24, 1993
Multiple beam optical disk apparatus with multiple clock extracting circuits used for monitoring and cross fading
SONY CORP18 citations69
US7280449B2Oct 9, 2007
Optical head and recording and/or reproducing apparatus
SONY CORP4 citations62
US7619959B2Nov 17, 2009
Optical head, optical recording medium recording and/or reproducing apparatus and recording and/or reproducing method using the optical head
SONY CORP2 citations61