Granted Patent
Utility
US 5,404,869 · App. 07/869,003
Faceted totally internally reflecting lens with individually curved faces on facets
Inventors:
William A. Parkyn, David G. Pelka, John M. Popovich
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Apr 16, 1992
Inventors
William A. Parkyn
David G. Pelka
John M. Popovich
Assignee (at issue)
TIR Technologies, 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.