Granted Patent
Utility
US 5,541,583 · App. 08/373,809
Arrangement for interrogating portable data communication devices
Inventor:
Richard Mandelbaum
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: Jan 17, 1995
Inventor
Richard Mandelbaum
Assignee (at issue)
AT&T CORP.
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.