Granted Patent
Utility
US 6,811,582 · App. 10/111,486
Abrasive grain with an abrasive coating
Inventors:
Thomas Wurzer, Franz Skale
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Aug 28, 2002
Inventors
Thomas Wurzer
Franz Skale
Assignee (at issue)
Treibacher Schleifmittel 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.