Granted Patent
Utility
US 4,240,669 · App. 05/947,367
Mining cutter bit holder and mounting assemblies
Inventor:
Lester G. Rollins
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Oct 2, 1978
Inventor
Lester G. Rollins
Assignee (at issue)
Joy Manufacturing Company
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.