Granted Patent
Utility
US 4,856,167 · App. 07/014,426
Method for producing near net ring gear forgings
Inventors:
Alvin M. Sabroff, James R. Douglas
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Feb 12, 1987
Inventors
Alvin M. Sabroff
James R. Douglas
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.