Granted Patent
Utility
US 4,446,906 · App. 06/206,430
Method of making a cast aluminum based engine block
Inventors:
Allen D. Ackerman, Howard A. Aula
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Nov 13, 1980
Inventors
Allen D. Ackerman
Howard A. Aula
Assignee (at issue)
Ford Motor Company
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.