Granted Patent
Utility
US 4,318,446 · App. 05/949,588
Linear motion impactor device
Inventor:
Richard E. Livesay
Patented Case
View Patent ↗
Granted: Mar 9, 1982
Filed: Oct 10, 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.