Granted Patent
Utility
US 6,615,696 · App. 10/013,076
Oval manway facing machine
Inventors:
Donato L. Ricci, Brent Place
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Dec 10, 2001
Inventors
Donato L. Ricci
Brent Place
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.