Granted Patent
Utility
US 4,477,030 · App. 06/188,371
Cone crushers
Inventors:
Paul R. Vifian, Gregory C. Kint
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Sep 18, 1980
Inventors
Paul R. Vifian
Gregory C. Kint
Assignee (at issue)
Pettibone, LLC
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.