Granted Patent
Utility
US 4,362,431 · App. 06/263,640
Vibrating apparatus for vibratory compactors
Inventor:
Thomas E. Cochran
Patented Case
View Patent ↗
Granted: Dec 7, 1982
Filed: May 14, 1981
Inventor
Thomas E. Cochran
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.