Assignee
XTEC INC
US12 patents
Top patents by PatentIndex Score
US6901375B2May 31, 2005
Methods and apparatus for electronically storing and retrieving value information on a portable card
XTEC INC127 citations98
US6266647B1Jul 24, 2001
Methods and apparatus for electronically storing and retrieving value information on a portable card
XTEC INC241 citations98
US6760841B1Jul 6, 2004
Methods and apparatus for securely conducting and authenticating transactions over unsecured communication channels
XTEC INC120 citations96
US5616904AApr 1, 1997
Data verification method and magnetic media therefor
XTEC INC133 citations95
US5644636AJul 1, 1997
Method and apparatus for securing data stored in semiconductor memory cells
XTEC INC52 citations94
US5235166AAug 10, 1993
Data verification method and magnetic media therefor
XTEC INC89 citations92
US6993130B1Jan 31, 2006
Methods and apparatus for mediametric data cryptoprocessing
XTEC INC42 citations90
US6678823B1Jan 13, 2004
Methods and apparatus for authenticating data stored in semiconductor memory cells
XTEC INC39 citations89
US6678103B2Jan 13, 2004
Methods and apparatus for increased magnetic coding density by precise placement of magnetic transitions
XTEC INC23 citations89
US6476991B1Nov 5, 2002
Methods and apparatus for increased magnetic coding density by precise placement of magnetic transitions
XTEC INC23 citations89
US7014103B2Mar 21, 2006
Differential radio frequency identification reader
XTEC INC12 citations82
US7309002B2Dec 18, 2007
Differential radio frequency identification reader
XTEC INC6 citations72