Granted Patent
Utility
US 6,447,220 · App. 09/610,079
Portable boring/facing machine
Inventors:
Donato L. Ricci, Martin A. Gardzinski
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Jul 5, 2000
Inventors
Donato L. Ricci
Martin A. Gardzinski
Assignee (at issue)
Donato L. Ricci
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.