Turboset with at least one low-pressure turbine stage having an outer housing and an inner housing coaxial thereto, and with high-pressure and/or medium-pressure turbine stage

Granted: May 17, 1988 Filed: Jun 26, 1986

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.