Granted Patent
Utility
US 6,145,606 · App. 09/264,291
Cutting insert for roof drill bit
Inventor:
Phillip W. Haga
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Mar 8, 1999
Inventor
Phillip W. Haga
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.