Granted Patent
Utility
US 4,282,797 · App. 05/965,906
Protective fluid system
Inventor:
Arthur Hirsch
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: Dec 4, 1978
Inventor
Arthur Hirsch
Assignee (at issue)
J. I. Case Company
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.