Granted Patent
Utility
US 6,021,945 · App. 08/935,145
Card reading device
Inventor:
Albert Hoolhorst
Patented Case
View Patent ↗
Granted: Feb 8, 2000
Filed: Sep 22, 1997
Inventor
Albert Hoolhorst
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.