Granted Patent
Utility
US 4,749,310 · App. 06/913,386
Mine roof truss
Inventor:
Claude C. White
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Sep 30, 1986
Inventor
Claude C. White
Assignee (at issue)
Birmingham Bolt Co., 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.