Granted Patent
Utility
US 5,068,519 · App. 07/463,316
Magnetic document validator employing remanence and saturation measurements
Inventor:
David R. Bryce
Patented Case
View Patent ↗
Granted: Nov 26, 1991
Filed: Jan 10, 1990
Inventor
David R. Bryce
Assignee (at issue)
THE BRANDT COMPANIES, LLC
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.