Granted Patent
Utility
US 4,596,969 · App. 06/732,357
Interdigital duplexer with notch resonators
Inventor:
Ronald E. Jachowski
Patented Case
View Patent ↗
Granted: Jun 24, 1986
Filed: May 8, 1985
Inventor
Ronald E. Jachowski
Assignee (at issue)
Orion Industries, Ltd.
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.