Granted Patent
Utility
US 6,231,199 · App. 09/537,298
Collecting and condensing optical system using cascaded parabolic reflectors
Inventor:
Kenneth Li
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Mar 29, 2000
Inventor
Kenneth Li
Assignee (at issue)
Cogent Light 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.