Granted Patent
Utility
US 4,129,934 · App. 05/839,183
Method of installing and removing locking device for earth working tool
Inventor:
Herman W. Gettman
Patented Case
View Patent ↗
Granted: Dec 19, 1978
Filed: Oct 4, 1977
Inventor
Herman W. Gettman
Assignee (at issue)
ESCO GROUP LLC
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.