Granted Patent
Utility
US 4,517,819 · App. 06/446,819
Method and apparatus for forging sprocket segments
Inventor:
Gianni Sandroni
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Dec 3, 1982
Inventor
Gianni Sandroni
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.