Granted Patent
Utility
US 4,531,428 · App. 06/456,937
Planetary transmission
Inventor:
Willis E. Windish
Patented Case
View Patent ↗
Granted: Jul 30, 1985
Filed: Jan 10, 1983
Inventor
Willis E. Windish
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.