Granted Patent
Utility
US 4,359,248 · App. 06/278,506
Roadable grouser for track shoes
Inventor:
Randall L. Kortering
Patented Case
View Patent ↗
Granted: Nov 16, 1982
Filed: Mar 4, 1981
Inventor
Randall L. Kortering
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.