Granted Patent
Utility
US 4,908,875 · App. 07/326,571
Adaptive thresholding technique
Inventors:
David Assael, Brian Lincoln
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Mar 21, 1989
Inventors
David Assael
Brian Lincoln
Assignee (at issue)
Hughes Aircraft Company
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.