Granted Patent
Utility
US 4,686,457 · App. 06/891,824
Method for measuring a signal's frequency components
Inventor:
Takuo Banno
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Aug 1, 1986
Inventor
Takuo Banno
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.