Granted Patent
Utility
US 5,640,957 · App. 08/488,502
Ultraviolet radiation protection evaluator
Inventors:
Ray Kaminski, Nikiforos Kollias
Patented Case
View Patent ↗
Granted: Jun 24, 1997
Filed: Jun 9, 1995
Inventors
Ray Kaminski
Nikiforos Kollias
Assignee (at issue)
Instruments SA, 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.