Granted Patent
Utility
US 6,752,221 · App. 10/337,701
Self-supporting pneumatic hammer positioner with universal joint
Inventor:
Danny Morissette
Patented Case
View Patent ↗
Granted: Jun 22, 2004
Filed: Dec 23, 2002
Inventor
Danny Morissette
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.