Granted Patent
Utility
US 4,800,348 · App. 07/081,264
Adjustable electronic filter and method of tuning same
Inventors:
George C. Rosar, David Clifford
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Aug 3, 1987
Inventors
George C. Rosar
David Clifford
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.