Granted Patent
Utility
US 4,528,868 · App. 06/391,579
Barrier guard for shears, presses and the like
Inventor:
Robert L. Hennesen
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Jun 24, 1982
Inventor
Robert L. Hennesen
Assignee (at issue)
Niagara Machine & Tool Works
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.