Granted Patent
Utility
US 5,175,518 · App. 07/778,303
Wide percentage bandwidth microwave filter network and method of manufacturing same
Inventor:
Daniel G. Swanson
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: Oct 15, 1991
Inventor
Daniel G. Swanson
Assignee (at issue)
Watkins-Johnson Company, 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.