Inventor
RANKL WOLFGANG
DE12 patents
⚠️ This page may combine multiple inventors who share the name “RANKL WOLFGANG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GIESECKE & DEVRIENT GMBH
6 patentsUS5534683AJul 9, 1996
System for conducting transactions with a multifunctional card having an electronic purse
GIESECKE & DEVRIENT GMBH60 citations94
US5850524ADec 15, 1998
Method for testing the authenticity of a data carrier
GIESECKE & DEVRIENT GMBH7 citations70
US7181602B1Feb 20, 2007
Method for exchanging at least one secret initial value between a processing station and a chip card
GIESECKE & DEVRIENT GMBH6 citations60
US7636438B1Dec 22, 2009
Data medium authentication method
GIESECKE & DEVRIENT GMBH2 citations59
US8346215B2Jan 1, 2013
Retrospective implementation of SIM capabilities in a security module
GIESECKE & DEVRIENT GMBH0 citations51
US9413428B2Aug 9, 2016
Transaction system
GIESECKE & DEVRIENT GMBH0 citations40
RANKL WOLFGANG
2 patentsUS8838925B2Sep 16, 2014
Method for securely storing data in a memory of a portable data carrier
RANKL WOLFGANG2 citations56
US8803658B2Aug 12, 2014
Method, portable data carrier, and system for releasing a transaction using an acceleration sensor to sense mechanical oscillations
RANKL WOLFGANG0 citations36
FINKENZELLER KLAUS
2 patentsUS10074087B2Sep 11, 2018
Method for carrying out a transaction between a portable data carrier and a terminal
FINKENZELLER KLAUS0 citations40
US8981900B2Mar 17, 2015
Method, portable data carrier, and system for releasing a transaction using an acceleration sensor to sense mechanical oscillations
FINKENZELLER KLAUS0 citations40