Granted Patent
Utility
US 4,379,675 · App. 06/270,533
Dampened fully pivotal hanger for a grapple
Inventors:
John R. Muntjanoff, Dennis Day
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Dec 4, 1980
Inventors
John R. Muntjanoff
Dennis Day
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.