Granted Patent
Utility
US 5,622,462 · App. 08/420,053
Twist drill bit
Inventors:
Ved P. Gakhar, David Brutscher, Wilfred M. McCord, Jr.
Patented Case
View Patent ↗
Granted: Apr 22, 1997
Filed: Apr 11, 1995
Inventors
Ved P. Gakhar
David Brutscher
Wilfred M. McCord, Jr.
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.