Granted Patent
Utility
US 4,601,616 · App. 06/711,303
Roof support system for a mine and the method and tooling for providing the same
Inventors:
Ken Barish, Paul Yacisin
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Mar 13, 1985
Inventors
Ken Barish
Paul Yacisin
Assignee (at issue)
Jennmar Corporation
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.