Granted Patent
Utility
US 4,873,903 · App. 07/216,191
Saw chain with wear link
Inventor:
Michael D. Harfst
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Jul 7, 1988
Inventor
Michael D. Harfst
Assignee (at issue)
Blount, 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.