Granted Patent
Utility
US 4,970,789 · App. 07/418,189
Sprocket nose guide bar for chain saws
Inventor:
Don A. Bell
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Oct 6, 1989
Inventor
Don A. Bell
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.