Hupfeld AG
Musikkrull. Rull til selvspill...
Kuhl & Klatt
Herbert Marshall & Sons, London
Victoria
The Aeolian Company, Ltd., London
American Piano Control (APC)
The [Brittish] Autoplayer Company Ltd.
Universal Music Company
The Autopiano Company
Felix Schüller (Meissner & Schüller)
The Aeolian Company
Choralion Company, m.b.H.
Schiedmayer Pianofortefabrik
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