Granted Patent
Utility
US 4,599,621 · App. 06/648,853
Two-frequency glide-path station for the standardized instrument-landing system ILS
Inventor:
Helmut Rausch
Patented Case
View Patent ↗
Granted: Jul 8, 1986
Filed: Sep 7, 1984
Inventor
Helmut Rausch
Assignee (at issue)
International Standard Electric Corporation
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.