Granted Patent
Utility
US 6,748,840 · App. 10/214,986
Saw chain having drive link with guard feature
Inventor:
Michael D. Harfst
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Aug 7, 2002
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.