Granted Patent
Utility
US 5,289,724 · App. 07/937,049
Gravimetric metering apparatus for pourable materials
Inventor:
Hans W. Hafner
Patented Case
View Patent ↗
Granted: Mar 1, 1994
Filed: Sep 1, 1992
Inventor
Hans W. Hafner
Assignee (at issue)
Pfister GmbH
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.