Granted Patent
Utility
US 5,232,402 · App. 07/820,818
Interior ventilation adjustment device
Inventor:
Loris Lorenzon
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Jan 15, 1992
Inventor
Loris Lorenzon
Assignee (at issue)
PERMASTEELISA 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.