Granted Patent
Utility
US 4,402,413 · App. 06/322,897
Counterweight arrangement
Inventor:
Emory J. Sickler
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Nov 19, 1981
Inventor
Emory J. Sickler
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.