Inventor
KOYAMA MASAYUKI
JP28 patents
⚠️ This page may combine multiple inventors who share the name “KOYAMA MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI ELECTRIC CORP
8 patentsUS6209109B1Mar 27, 2001
Code synchronization decision circuit of Viterbi decoder
MITSUBISHI ELECTRIC CORP18 citations82
US6047004AApr 4, 2000
Synchronizing device with head word position verification
MITSUBISHI ELECTRIC CORP15 citations73
US5530843AJun 25, 1996
Logic description conversion apparatus and a logic description conversion method
MITSUBISHI ELECTRIC CORP9 citations73
US6633966B1Oct 14, 2003
FIFO memory having reduced scale
MITSUBISHI ELECTRIC CORP3 citations62
US6381723B1Apr 30, 2002
Error correction device for correcting error in input symbol string
MITSUBISHI ELECTRIC CORP4 citations62
US6067605AMay 23, 2000
Bidirectional transfer type storage and method for controlling input and output of memory
MITSUBISHI ELECTRIC CORP2 citations62
US6094741AJul 25, 2000
Viterbi decoding apparatus, method for controlling slip state of convolutional code in viterbi decoding apparatus, and slip state control apparatus
MITSUBISHI ELECTRIC CORP3 citations60
US5914897AJun 22, 1999
FIFO memory device having address detection portion
MITSUBISHI ELECTRIC CORP2 citations60
PIONEER CORP
7 patentsUS6480456B1Nov 12, 2002
Optical pickup apparatus for reading different types of recording media at different reading wavelengths
PIONEER CORP36 citations91
US6452880B1Sep 17, 2002
Optical pickup apparatus
PIONEER CORP21 citations91
US6429981B2Aug 6, 2002
Optical pickup apparatus
PIONEER CORP10 citations72
US7124420B2Oct 17, 2006
Pickup device having a heat-radiation path
PIONEER CORP10 citations70
US7137130B2Nov 14, 2006
Pickup device with heat-radiating mechanism
PIONEER CORP6 citations59
US6845078B2Jan 18, 2005
Optical pickup apparatus
PIONEER CORP3 citations59
US6912234B2Jun 28, 2005
Optical pickup apparatus and laser diode chip
PIONEER CORP0 citations51
PIONEER ELECTRONIC CORP
5 patentsUS6055076AApr 25, 2000
Optical pickup device including a hologram lens section with an ellipsoidal diffraction grating pattern concentrically and symmetrically formed with respect to an optical axis
PIONEER ELECTRONIC CORP24 citations92
US6172779B1Jan 9, 2001
Optical pickup device including a hologram lens section with an oval diffraction grating pattern
PIONEER ELECTRONIC CORP9 citations74
US6160646ADec 12, 2000
Optical pickup device including a holographic lens section with a double side cut circular diffraction grating pattern
PIONEER ELECTRONIC CORP7 citations74
US5798988AAug 25, 1998
Optical pickup unit capable of reading signals recorded on different types of optical disks
PIONEER ELECTRONIC CORP8 citations73
US5663841ASep 2, 1997
Optical pickup device having a magnetic circuit whose poles are configured along a common path within one pole within a focus coil
PIONEER ELECTRONIC CORP7 citations72
RENESAS ELECTRONICS CORP
2 patentsRENESAS TECH CORP
2 patentsUS7716410B2May 11, 2010
Information device including main processing circuit, interface circuit, and microcomputer
RENESAS TECH CORP3 citations61
US6944218B2Sep 13, 2005
Adaptive filter having a small circuit scale with a low power consumption and tap-coefficients updating method of adaptive filter
RENESAS TECH CORP0 citations41