Granted Patent
Utility
US 4,957,525 · App. 07/453,875
Composite bushing design
Inventors:
Dean J. Gaertner, Eugene J. Palamara
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Dec 20, 1989
Inventors
Dean J. Gaertner
Eugene J. Palamara
Assignee (at issue)
PPG Industries, 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.