Granted Patent
Utility
US 4,497,520 · App. 06/489,990
Rotatable cutting bit
Inventor:
Randall W. Ojanen
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Apr 29, 1983
Inventor
Randall W. Ojanen
Assignee (at issue)
GTE Products Corporation
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.