Granted Patent
Utility
US 5,337,381 · App. 08/007,112
Fiber optic cylindrical diffuser
Inventors:
Dipak R. Biswas, Anpei Pan
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Jan 21, 1993
Inventors
Dipak R. Biswas
Anpei Pan
Assignee (at issue)
Fiberguide Industries, 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.