Granted Patent
Utility
US 4,347,971 · App. 06/238,498
Centrifuge apparatus
Inventor:
John Novoselac
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Feb 26, 1981
Inventor
John Novoselac
Assignee (at issue)
Joy Manufacturing Company
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.