Granted Patent
Utility
US 4,593,187 · App. 06/437,721
Non-imaging illumination incidence angle detection system
Inventors:
Jeffrey Grotts, Rene Abreu
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Oct 29, 1982
Inventors
Jeffrey Grotts
Rene Abreu
Assignee (at issue)
PerkinElmer, 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.