Granted Patent
Utility
US 4,530,258 · App. 06/489,869
Saw chain sharpening method and apparatus
Inventors:
Duane M. Gibson, Lewis A. Scott
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: May 6, 1983
Inventors
Duane M. Gibson
Lewis A. Scott
Assignee (at issue)
Omark Industries, 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.