Granted Patent
Utility
US 6,044,920 · App. 09/108,181
Rotatable cutting bit assembly with cutting inserts
Inventors:
Ted R. Massa, David R. Siddle
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Jul 1, 1998
Inventors
Ted R. Massa
David R. Siddle
Assignee (at issue)
KENNAMETAL 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.