Granted Patent
Utility
US 4,829,274 · App. 07/092,870
Multiple resonator dielectric filter
Inventors:
Steven R. Green, David M. De Muro, Raymond L. Sokola
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Sep 3, 1987
Inventors
Steven R. Green
David M. De Muro
Raymond L. Sokola
Assignee (at issue)
Motorola, 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.