Granted Patent
Utility
US 6,435,287 · App. 09/773,884
Sharp gage for mill tooth rock bits
Inventor:
Roy D. Estes
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Feb 1, 2001
Inventor
Roy D. Estes
Assignee (at issue)
Rock Bit International, L.P.
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.