Inventor
NAITO RYUICHI
JP25 patents
Patents
25 patentsUS5463604AOct 31, 1995
Optical disc with data recorded at different rates on different zones and recording apparatus, and reproducing apparatus therefor
PIONEER ELECTRONIC CORP73 citations96
US5619484AApr 8, 1997
Pulling-in circuit for PLL circuit, pulling-in method for PLL circuit, PLL circuit device and apparatus for reproducing optical disc
PIONEER ELECTRONIC CORP21 citations92
US5025431AJun 18, 1991
Autochanger of writable discs
PIONEER ELECTRONIC CORP27 citations92
US4929917AMay 29, 1990
Phase-locked loop circuit
PIONEER ELECTRONIC CORP26 citations92
US4611319ASep 9, 1986
Disc drive control system
PIONEER ELECTRONIC CORP42 citations92
US4535306AAug 13, 1985
Phase-locked loop detecting circuit
PIONEER ELECTRONIC CORP30 citations92
US4540897ASep 10, 1985
Digital modulation signal reading device
PIONEER ELECTRONIC CORP25 citations81
US5025432AJun 18, 1991
Autochanger of writable discs including a non-volatile memory for storing most recent defect management information relating to the writable discs
PIONEER ELECTRONIC CORP15 citations74
US4935618AJun 19, 1990
Wide bandwidth photoelectric converting circuit
PIONEER ELECTRONIC CORP10 citations74
US4679181AJul 7, 1987
Method for detecting an error in loading a recording disc
PIONEER ELECTRONIC CORP8 citations74
US6262964B1Jul 17, 2001
Disc player with objective lens arranged in a zigzag pattern
PIONEER ELECTRONIC CORP5 citations73
US5848049ADec 8, 1998
Disc player with parallel objective lenses
PIONEER ELECTRONIC CORP4 citations73
US5677904AOct 14, 1997
Disc player
PIONEER ELECTRONIC CORP5 citations73
US5671201ASep 23, 1997
Pulling-in circuit for PLL circuit, pulling-in method for PLL circuit, PLL circuit device and apparatus for reproducing optical disc
PIONEER ELECTRONIC CORP10 citations73
US5646921AJul 8, 1997
Method and apparatus for reproducing information recorded on CLV disc type record medium
PIONEER ELECTRONIC CORP10 citations73
US5034934AJul 23, 1991
Opto-magnetic disk unit with improved dynamic range characteristics and opto-magnetic disk therefor
PIONEER ELECTRONIC CORP13 citations73
US4544837AOct 1, 1985
Focus servo control device for an optical system having an initial focus locking operation
PIONEER ELECTRONIC CORP15 citations72
US5021894AJun 4, 1991
Recorded data demodulation circuit
PIONEER ELECTRONIC CORP12 citations71
US5001698AMar 19, 1991
Read-out information signal processing circuit in an optical recording and reproducing system
PIONEER ELECTRONIC CORP2 citations63
US4637005AJan 13, 1987
Focus servo device of a system for reading out recorded information
PIONEER ELECTRONIC CORP4 citations63
US4636745AJan 13, 1987
Signal waveform equalizing circuitry
PIONEER ELECTRONIC CORP4 citations63
US4486795ADec 4, 1984
Disc drive servo system
PIONEER ELECTRONIC CORP2 citations63
US5953308ASep 14, 1999
Disc player with alternating ascending/descending guide devices
PIONEER ELECTRONIC CORP2 citations62
US5023876AJun 11, 1991
Method and apparatus for detecting finally recorded sector
PIONEER ELECTRONIC CORP3 citations62
US4493068AJan 8, 1985
Pick-up point dislocation detecting device in recording a disc player
PIONEER ELECTRONIC CORP0 citations42