Aeolian. Aeolian [left] was patented in 1890 by Rudolph Gnishwitz of the Keystone TF (Philadelphia) [USPTO D20364], formerly of MSJ. Rights were assigned to the Mather Manufacturing Company, parent corporation of the TF. The affidavit clearly claims design credit.
A high-resolution scan of Aeolian Open [right] has been furnished to Koeiekat, who intends to digitize Aeolian.