Granted Patent
Utility
US 4,392,591 · App. 06/206,645
Apparatus for metering semi-flowable material
Inventor:
Arthur L. Fassauer
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Nov 13, 1980
Inventor
Arthur L. Fassauer
Assignee (at issue)
Geosource, 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.