Granted Patent
Utility
US 4,886,332 · App. 07/109,989
Optical systems with thin film polarization rotators and method for fabricating such rotators
Inventor:
Raymond Wolfe
Patented Case
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Granted: Dec 12, 1989
Filed: Oct 19, 1987
Inventor
Raymond Wolfe
Assignee (at issue)
American Telephone and Telegraph, Co.
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.