Granted Patent
Utility
US 4,464,624 · App. 06/311,787
Broadband optical spectrum analyzer
Inventor:
Johann M. Osterwalder
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Oct 15, 1981
Inventor
Johann M. Osterwalder
Assignee (at issue)
General Dynamics Corporation, Electronics Division
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.