Granted Patent
Utility
US 4,402,633 · App. 06/235,015
Method of installing a rock bolt
Inventor:
James M. Self
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Feb 17, 1981
Inventor
James M. Self
Assignee (at issue)
Tanner Chemical Company, 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.