Granted Patent
Utility
US 4,741,825 · App. 07/070,143
Mobile vortex shield
Inventor:
Alan G. Schiller
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: Jul 2, 1987
Inventor
Alan G. Schiller
Assignee (at issue)
Aeration Industries, 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.