Granted Patent
Utility
US 4,672,200 · App. 06/795,376
Optical inspection of transparent layers
Inventors:
Mark P. Claypool, Patrick T. Battersby
Patented Case
View Patent ↗
Granted: Jun 9, 1987
Filed: Nov 5, 1985
Inventors
Mark P. Claypool
Patrick T. Battersby
Assignee (at issue)
Emhart Industries, 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.