Granted Patent
Utility
US 4,848,909 · App. 07/125,513
Ion beam sputtered mirrors for ring laser gyros
Inventor:
Barrett E. Cole
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Nov 25, 1987
Inventor
Barrett E. Cole
Assignee (at issue)
Honeywell 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.