Granted Patent
Utility
US 6,428,881 · App. 09/399,193
Matboard/backing board and methods of manufacture and use
Inventor:
David Zucker
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Sep 17, 1999
Inventor
David Zucker
Assignee (at issue)
Rupaco Paper Corporation
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.