Granted Patent
Utility
US 4,780,948 · App. 06/801,187
Forged dissimilar metal assembly and method
Inventors:
John H. Ferguson, Dana Perkins
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: Nov 25, 1985
Inventors
John H. Ferguson
Dana Perkins
Assignee (at issue)
Parker-Hannifin 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.