Granted Patent
Utility
US 5,227,839 · App. 07/720,205
Small field scanner
Inventor:
Paul C. Allen
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jun 24, 1991
Inventor
Paul C. Allen
Assignee (at issue)
ETEC SYSTEMS, 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.