Granted Patent
Utility
US 4,668,983 · App. 06/800,175
Optical inspection system
Inventor:
Michael John Werson
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Oct 29, 1985
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.