Granted Patent
Utility
US 4,996,839 · App. 07/329,661
Turbocharged compound cycle ducted fan engine system
Inventors:
Ronald E. Wilkinson, Ralph Benway
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Mar 29, 1989
Inventors
Ronald E. Wilkinson
Ralph Benway
Assignee (at issue)
Teledyne 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.