Granted Patent
Utility
US 4,946,718 · App. 07/274,017
Air curtain housing for conveyor mechanism
Inventor:
Stanley C. Napadow
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Nov 21, 1988
Inventor
Stanley C. Napadow
Assignee (at issue)
Protectaire Systems, Co.
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.