Granted Patent
Utility
US 5,810,587 · App. 08/647,686
Friable abrasive media
Inventors:
Craig R. Bruns, Thomas S. Blake, Mark S. Fernwood
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: May 13, 1996
Inventors
Craig R. Bruns
Thomas S. Blake
Mark S. Fernwood
Assignee (at issue)
Danville Engineering
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.