Granted Patent
Utility
US 6,505,799 · App. 10/039,222
Ice screw with non-linear taper
Inventors:
John Bercaw, Chris Harmston, William James Reimann, Paul A. Tusting, Tyler Warner
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Jan 4, 2002
Inventors
John Bercaw
Chris Harmston
William James Reimann
Paul A. Tusting
Tyler Warner
Assignee (at issue)
Black Diamond Equipment, LTD.
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.