Granted Patent
Utility
US 5,339,931 · App. 08/057,932
Porous copper powder modified friction material
Inventors:
Michael G. Jacko, Peter H. Tsang, Seong K. Rhee
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: May 7, 1993
Inventors
Michael G. Jacko
Peter H. Tsang
Seong K. Rhee
Assignee (at issue)
AlliedSignal, Inc.
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.