Inventor
GRENFELL JACK RICHARD
US4 patents
Patents
4 patentsUS7878397B2Feb 1, 2011
Enhanced security magnetic card reader especially useful in point of sale devices
VERIFONE INC16 citations81
US11088767B2Aug 10, 2021
Point of sale device and method for operating same
VERIFONE INC1 citations55
US9020427B2Apr 28, 2015
Point of sale device and method for operating same
VERIFONE INC1 citations44
US9208361B1Dec 8, 2015
Magnetic stripe card reader
VERIFONE INC0 citations43