Granted Patent
Utility
US 4,537,823 · App. 06/553,288
Method of manufacturing a friction article
Inventors:
Peter H. Tsang, Joseph P. Coyle, Tung Liu, John G. Vanderpoorte
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Nov 18, 1983
Inventors
Peter H. Tsang
Joseph P. Coyle
Tung Liu
John G. Vanderpoorte
Assignee (at issue)
ALLIED CONSULTING, 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.