Granted Patent
Utility
US 4,250,793 · App. 05/967,801
Cushioning device for fluid jacks
Inventor:
Lawrance F. Berg
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: Nov 20, 1978
Inventor
Lawrance F. Berg
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.