Granted Patent
Utility
US 6,220,166 · App. 09/365,655
Apparatus and method for producing fragment-free openings
Inventor:
Christopher Cherry
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Aug 2, 1999
Inventor
Christopher Cherry
Assignee (at issue)
Sandia 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.