Granted Patent
Utility
US 4,484,783 · App. 06/400,733
Retainer and wear sleeve for rotating mining bits
Inventor:
Kenneth C. Emmerich
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Jul 22, 1982
Inventor
Kenneth C. Emmerich
Assignee (at issue)
Fansteel 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.