Granted Patent
Utility
US 4,418,872 · App. 06/213,413
Feeder/crusher machine
Inventor:
Robert C. Nelson
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Dec 5, 1980
Inventor
Robert C. Nelson
Assignee (at issue)
Baker Mine Services, 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.