Granted Patent
Utility
US 5,807,039 · App. 08/799,836
Drill bit
Inventors:
Gerald D. Booher, Juergen Wiker, Philip O. McKinney
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Feb 13, 1997
Inventors
Gerald D. Booher
Juergen Wiker
Philip O. McKinney
Assignee (at issue)
Credo Tool 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.