Granted Patent
Utility
US 4,741,142 · App. 06/898,371
Slim seam roofing panel
Inventors:
Lyle G. Otto, Justin L. McNamee
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: Aug 20, 1986
Inventors
Lyle G. Otto
Justin L. McNamee
Assignee (at issue)
Alumax 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.