Granted Patent
Utility
US 4,428,173 · App. 06/245,236
Load carrying structure and method of manufacture therefor
Inventor:
Harvey A. Knell
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Apr 9, 1980
Inventor
Harvey A. Knell
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.