Granted Patent
Utility
US 4,761,867 · App. 07/014,429
Method for producing ring gears for heavy-duty drive axles
Inventors:
George W. Vollmer, Alvin M. Sabroff
Patented Case
View Patent ↗
Granted: Aug 9, 1988
Filed: Feb 12, 1987
Inventors
George W. Vollmer
Alvin M. Sabroff
Assignee (at issue)
Eaton Corporation
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.