Granted Patent
Utility
US 5,071,459 · App. 07/530,681
Bushing balance controller for multiple segment bushings
Inventor:
John J. Kuhn
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: May 30, 1990
Inventor
John J. Kuhn
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.