Granted Patent
Utility
US 4,291,473 · App. 06/090,817
Ski boot device for facilitating walking
Inventor:
Mariano Sartor
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Nov 2, 1979
Inventor
Mariano Sartor
Assignee (at issue)
Nordica S.p.A.
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.