Granted Patent
Utility
US 5,235,340 · App. 07/827,414
Frequency domain polarimeter
Inventor:
Donald F. Shea
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Jan 29, 1992
Inventor
Donald F. Shea
Assignee (at issue)
E-Systems, 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.