Granted Patent
Utility
US 4,301,641 · App. 06/183,510
Article transfer apparatus
Inventors:
Merle G. McElwain, Gary D. Keckler
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Sep 2, 1980
Inventors
Merle G. McElwain
Gary D. Keckler
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.