Granted Patent
Utility
US 4,307,792 · App. 06/131,511
Forklift roller mast lock
Inventors:
Samuel L. Benson, Louis T. Jensen
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Mar 18, 1980
Inventors
Samuel L. Benson
Louis T. Jensen
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.