Granted Patent
Utility
US 4,356,137 · App. 06/214,841
Process for preparing friction clutch facing
Inventors:
Raymond L. Guzy, Robert V. Wargin
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Dec 10, 1980
Inventors
Raymond L. Guzy
Robert V. Wargin
Assignee (at issue)
BorgWarner 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.