Granted Patent
Utility
US 4,839,709 · App. 07/087,953
Detector and mixer diode operative at zero bias voltage
Inventor:
Mark P. Zurakowski
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Aug 10, 1987
Inventor
Mark P. Zurakowski
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.