Granted Patent
Utility
US 4,448,459 · App. 06/385,416
Roadable track shoe with sealed grouser
Inventors:
Randall L. Kortering, Danny J. Becker
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Apr 13, 1982
Inventors
Randall L. Kortering
Danny J. Becker
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.