Granted Patent
Utility
US 5,511,023 · App. 08/240,928
Method and circuit configuration for debiting a debit card
Inventor:
Hartmut Schrenk
Patented Case
View Patent ↗
Granted: Apr 23, 1996
Filed: May 10, 1994
Inventor
Hartmut Schrenk
Assignee (at issue)
Siemens Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.