Granted Patent
Utility
US 4,521,807 · App. 06/397,716
Optical inspection system
Inventor:
Michael John Werson
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Jul 13, 1982
Inventor
Michael John Werson
Assignee (at issue)
W. R. Grace & Co.
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.