Granted Patent
Utility
US 5,283,488 · App. 08/020,930
Rotor cooling structure
Inventors:
Rengasamy Ponnappan, Jerry E. Beam
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Feb 22, 1993
Inventors
Rengasamy Ponnappan
Jerry E. Beam
Assignee (at issue)
United States of America as represented by the Secretary of the Air Force
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.