Granted Patent
Utility
US 6,371,222 · App. 09/673,055
Hammer device
Inventors:
Kurt Andersson, Jörgen Rodert
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Oct 10, 2000
Inventors
Kurt Andersson
Jörgen Rodert
Assignee (at issue)
Atlas Copco Rock Drills AB
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.