Granted Patent
Utility
US 6,537,402 · App. 09/916,155
Membrane welding apparatus including a visual seam marker
Inventors:
Harold T. Pate, Dave Scott
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Jul 26, 2001
Inventors
Harold T. Pate
Dave Scott
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.