Granted Patent
Utility
US 4,489,293 · App. 06/466,180
Miniature dual-mode, dielectric-loaded cavity filter
Inventor:
Slawomir J. Fiedziuszko
Patented Case
View Patent ↗
Granted: Dec 18, 1984
Filed: Feb 14, 1983
Inventor
Slawomir J. Fiedziuszko
Assignee (at issue)
Ford Aerospace & Communications Corporation
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.