Granted Patent
Utility
US 5,296,972 · App. 07/923,314
Non-polarizing image rotation apparatus and method
Inventor:
William G. McKinley
Patented Case
View Patent ↗
Granted: Mar 22, 1994
Filed: Jul 31, 1992
Inventor
William G. McKinley
Assignee (at issue)
Litton 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.