Granted Patent
Utility
US 6,196,039 · App. 09/363,922
Groove rolling of piping elements
Inventors:
James O. Williams, Bruce M. Platusich, Sandra M. Lippka
Patented Case
View Patent ↗
Granted: Mar 6, 2001
Filed: Jul 30, 1999
Inventors
James O. Williams
Bruce M. Platusich
Sandra M. Lippka
Assignee (at issue)
Anvil International, LLC
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.