Granted Patent
Utility
US 4,733,239 · App. 06/583,668
Radar altimeter
Inventor:
Jerry C. Schmitt
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Feb 27, 1984
Inventor
Jerry C. Schmitt
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.