Granted Patent
Utility
US 4,647,211 · App. 06/722,664
Apparatus for measuring reflectivity which is tolerant of background and product trajectory variations
Inventor:
Edward M. Browne
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Apr 12, 1985
Inventor
Edward M. Browne
Assignee (at issue)
ESM International 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.