Granted Patent
Utility
US 4,560,148 · App. 06/648,235
Log skidder vehicle brake system
Inventor:
Marvin K. Palmer
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Mar 22, 1982
Inventor
Marvin K. Palmer
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.