Assignee
DCARD INC
US14 patents
Top patents by PatentIndex Score
US6311893B1Nov 6, 2001
Optical data access system with data card reader having a single rotational moving pickup head
DCARD INC15 citations91
US7334733B2Feb 26, 2008
Data access device using rotational head to access data stored in data strips and data arc segments or data circles
DCARD INC9 citations83
US6775080B2Aug 10, 2004
Data access device implemented with open and closed control loops to access data stored in discrete stepwise segments
DCARD INC9 citations72
US6728059B2Apr 27, 2004
Magnetic data card servo writer
DCARD INC7 citations72
US6502755B2Jan 7, 2003
Optical data storage card
DCARD INC6 citations72
US6417980B1Jul 9, 2002
Magnetic data card servo writer
DCARD INC5 citations72
US6339569B1Jan 15, 2002
Optical data card servo writer
DCARD INC5 citations72
US6307709B1Oct 23, 2001
Magnetic data storage card
DCARD INC4 citations72
US6934098B2Aug 23, 2005
Data card with a full circular track for alignment and amplitude calibration
DCARD INC8 citations71
US7336569B2Feb 26, 2008
Optical disk tracking servo circuit enabled to compensate for non-continuous track segments or prolonged defect
DCARD INC6 citations62
US7185814B2Mar 6, 2007
Layer structure and method of manufacture for optical memory strip (OMS)
DCARD INC2 citations62
US6588671B2Jul 8, 2003
Positioning of a recording head for a data storage device
DCARD INC4 citations60
US6499659B1Dec 31, 2002
Pulse shaping for a transformer coupled read/write recording device
DCARD INC2 citations54
US6545831B1Apr 8, 2003
Servo-sector arrangement over several data arcs for a rotational head data recording and retrieving system
DCARD INC0 citations51