Granted Patent
Utility
US 4,142,421 · App. 05/831,018
Transmission arrangement
Inventors:
W. Gene Stevens, Raymond P. Cobb
Patented Case
View Patent ↗
Granted: Mar 6, 1979
Filed: Sep 6, 1977
Inventors
W. Gene Stevens
Raymond P. Cobb
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.