Granted Patent
Utility
US 4,400,052 · App. 06/245,628
Method for manufacturing birefringent integrated optics devices
Inventors:
Rodney C. Alferness, Janet Jackel
Patented Case
View Patent ↗
Granted: Aug 23, 1983
Filed: Mar 19, 1981
Inventors
Rodney C. Alferness
Janet Jackel
Assignee (at issue)
Bell Telephone Laboratories, 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.