Granted Patent
Utility
US 5,425,821 · App. 08/242,733
Iron aluminum based engine intake valves and its manufacturing method
Inventors:
Mohan Kurup, Roger R. Wills, Mark S. Scherer
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: May 13, 1994
Inventors
Mohan Kurup
Roger R. Wills
Mark S. Scherer
Assignee (at issue)
TRW Limited
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.