Granted Patent
Utility
US 4,143,863 · App. 05/830,544
Lift top quench hardening press
Inventor:
Kenneth D. Gladden
Patented Case
View Patent ↗
Granted: Mar 13, 1979
Filed: Sep 6, 1977
Inventor
Kenneth D. Gladden
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.