Granted Patent
Utility
US 6,501,548 · App. 09/883,602
Retardance measurement method
Inventor:
Rudolf Oldenbourg
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: Jun 18, 2001
Inventor
Rudolf Oldenbourg
Assignee (at issue)
Cambridge Research & Instrumentation, 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.