Granted Patent
Utility
US 4,418,643 · App. 06/443,634
Feed hopper assembly for particulate material and printer
Inventors:
Robert M. Barto, Jr., Ira L. Lopata
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Nov 22, 1982
Inventors
Robert M. Barto, Jr.
Ira L. Lopata
Assignee (at issue)
Ragen Precision 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.