Granted Patent
Utility
US 4,945,957 · App. 07/393,833
High-resolution weigher/feeder for fine particulate materials
Inventors:
Kenneth A. Kardux, Thomas Kristo-Nagy
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Aug 14, 1989
Inventors
Kenneth A. Kardux
Thomas Kristo-Nagy
Assignee (at issue)
OHAUS Corporation
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.