Granted Patent
Utility
US 4,858,159 · App. 07/111,843
Frequency-tuneable filter calibration
Inventors:
Lynn M. Wheelwright, Vicky A. Hansen, Mark D. Heerema
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Oct 19, 1987
Inventors
Lynn M. Wheelwright
Vicky A. Hansen
Mark D. Heerema
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.