Granted Patent
Utility
US 6,421,131 · App. 09/607,836
Birefringent interferometer
Inventor:
Peter J. Miller
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Jun 30, 2000
Inventor
Peter J. Miller
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.