Granted Patent
Utility
US 6,187,122 · App. 09/203,702
Dual-weld roof membrane welding apparatus and method of using same
Inventors:
Michael J. Hubbard, John Jordon
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Dec 2, 1998
Inventors
Michael J. Hubbard
John Jordon
Assignee (at issue)
Omnova Solutions, Inc.
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.