Granted Patent
Utility
US 4,609,709 · App. 06/767,381
Mat binders
Inventor:
Ben J. Yau
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Aug 19, 1985
Inventor
Ben J. Yau
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.