Granted Patent
Utility
US 4,343,591 · App. 06/106,781
Turbomachine seal system
Inventors:
William F. Hannan, III, Charles C. Czuszak
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Dec 26, 1979
Inventors
William F. Hannan, III
Charles C. Czuszak
Assignee (at issue)
Elliott Turbomachinery Co., 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.