Granted Patent
Utility
US 4,306,753 · App. 06/090,152
Articulated chain with mid-pitch drive and replaceable drive bushing
Inventors:
Richard E. Livesay, Paul L. Wright
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Aug 27, 1979
Inventors
Richard E. Livesay
Paul L. Wright
Assignee (at issue)
Caterpillar Tractor Co.
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.