Granted Patent
Utility
US 4,885,843 · App. 07/169,995
Laminated guide bar for chain saws having foam core
Inventors:
Royal E. Kelsay, III, Arvin A. Hille
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Mar 18, 1988
Inventors
Royal E. Kelsay, III
Arvin A. Hille
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.