Granted Patent
Utility
US 5,326,513 · App. 07/752,576
Process and device for the production of plastic fiber boards
Inventor:
Albert Kubbutat
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Sep 9, 1991
Inventor
Albert Kubbutat
Assignee (at issue)
Sto Poraver GmbH
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.