Granted Patent
Utility
US 4,247,149 · App. 05/973,046
Mechanically actuated impact mechanism
Inventor:
Richard E. Livesay
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Dec 11, 1978
Inventor
Richard E. Livesay
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.