Granted Patent
Utility
US 4,888,149 · App. 07/250,057
Wear-reduction-shield for thimbles
Inventor:
William J. Bryan
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Sep 27, 1988
Inventor
William J. Bryan
Assignee (at issue)
Combustion Engineering, 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.