Granted Patent
Utility
US 5,248,856 · App. 07/958,076
Code-based, electromagnetic-field-responsive graphic data-acquisition system
Inventor:
Samuel W. Mallicoat
Patented Case
View Patent ↗
Granted: Sep 28, 1993
Filed: Oct 7, 1992
Inventor
Samuel W. Mallicoat
Assignee (at issue)
Microfield Graphics, Inc.
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.