Granted Patent
Utility
US 4,876,877 · App. 07/206,362
Portable tool for bending roof bolts for insertion in mine roof openings
Inventor:
Claude C. White
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Jun 14, 1988
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.