Granted Patent
Utility
US 5,073,700 · App. 07/462,817
Mark sense detector with variable threshold
Inventor:
Enzo D. D'Onofrio
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Jan 10, 1990
Inventor
Enzo D. D'Onofrio
Assignee (at issue)
GTECH Corporation
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.