Hupfeld AG
Musikkrull. Rull til selvspill...
Kuhl & Klatt
Josef Blohut, Leipzig
Herbert Marshall & Sons, London
U.M.E.C.A.
The Aeolian Company, Ltd., London
Collection Francis Salabert Paris
Victoria
American Piano Control (APC)
The [Brittish] Autoplayer Company Ltd.
Universal Music Company
The Autopiano Company
Felix Schüller (Meissner & Schüller)
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