Granted Patent
Utility
US 5,136,267 · App. 07/633,675
Tunable bandpass filter system and filtering method
Inventor:
Richard C. Cabot
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Dec 26, 1990
Inventor
Richard C. Cabot
Assignee (at issue)
AUDIO PRECISION, 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.