Granted Patent
Utility
US 6,467,570 · App. 09/855,983
Spark arrester with spark filter
Inventor:
Andrew Herold
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: May 15, 2001
Inventor
Andrew Herold
Assignee (at issue)
Arvin Technologies, Inc.
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.