Granted Patent
Utility
US 4,437,795 · App. 06/317,490
Mine roof anchor assembly
Inventor:
Claude C. White
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Nov 2, 1981
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.