Inventor
GRASSENS LEONARDUS J
US21 patents
⚠️ This page may combine multiple inventors who share the name “GRASSENS LEONARDUS J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DISCOVISION ASS
14 patentsUS6122232ASep 19, 2000
Isolation apparatus for use in disc drive system to mitigate effects of undesired mechanical forces and disc drive system including same
DISCOVISION ASS88 citations98
US5729511AMar 17, 1998
Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
DISCOVISION ASS124 citations98
US6266306B1Jul 24, 2001
Analog to digital converter and assembly for use in optical drive system to normalize servo error signals and multiplex reference voltage inputs and digital outputs
DISCOVISION ASS24 citations95
US6243336B1Jun 5, 2001
Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal and focus capture method for use in same
DISCOVISION ASS17 citations92
US5532989AJul 2, 1996
Seek actuator for optical recording
DISCOVISION ASS29 citations92
US5708633AJan 13, 1998
Method and apparatus for manufacturing information storage devices
DISCOVISION ASS33 citations86
US6532199B1Mar 11, 2003
Optical actuator assembly with lens position sensor for recording or playback
DISCOVISION ASS13 citations84
US6058081AMay 2, 2000
Optical drive system having servomotor operated relative to maximum quad sum signal
DISCOVISION ASS15 citations81
US6141300AOct 31, 2000
Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same
DISCOVISION ASS14 citations74
US6023379AFeb 8, 2000
Method and apparatus for aligning an objective lens
DISCOVISION ASS7 citations71
US5768035AJun 16, 1998
Method and apparatus for aligning an objective lens
DISCOVISION ASS7 citations71
US5742441AApr 21, 1998
Method and apparatus for aligning an objective lens
DISCOVISION ASS7 citations71
US5790325AAug 4, 1998
Method and apparatus for focusing a lens
DISCOVISION ASS1 citations60
US5808980ASep 15, 1998
Seek actuator for optical recording
DISCOVISION ASS0 citations42
APPLIED MAGNETICS CORP
4 patentsUS5313332AMay 17, 1994
Flexure suspension for two axis actuator
APPLIED MAGNETICS CORP78 citations96
US5265079ANov 23, 1993
Seek actuator for optical recording
APPLIED MAGNETICS CORP45 citations96
US5177640AJan 5, 1993
Two-axis moving coil actuator
APPLIED MAGNETICS CORP79 citations96
US5136558AAug 4, 1992
Two axis electromagnetic actuator
APPLIED MAGNETICS CORP71 citations96