Granted Patent
Utility
US 4,006,638 · App. 05/517,482
Altimeter-encoder
Inventor:
Rudolf G. Woelfl
Patented Case
View Patent ↗
Granted: Feb 8, 1977
Filed: Oct 24, 1974
Inventor
Rudolf G. Woelfl
Assignee (at issue)
G&H Technology, Inc.
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.