Granted Patent
Utility
US 4,645,302 · App. 06/561,117
Light beam-splitter
Inventor:
John E. Aughton
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Dec 13, 1983
Inventor
John E. Aughton
Assignee (at issue)
Crosfield Electronics Limited
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.