DE217287C
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DE3139404C2
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1988-12-01
DE137603C
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DE225427C
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1900-01-01
DE1946970C3
(de )
1978-08-03
Klaviermechanik
DE20604C
(de )
Repetirende Kombinations-Mechanik für Flügel und Pianinos
DE160626C
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DE32347C
(de )
Neuerung an der Pianoforte-Mechanik
DE55636C
(de )
Mechanik für Pianofortes
DE282935C
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DE156817C
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AT46122B
(de )
1911-01-25
Schraubenschlüssel.
DE49841C
(de )
Oktavenkuppelung für Pianino's
DE265968C
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DE190003C
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DE115574C
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DE358344C
(de )
1922-09-11
Haemmerwerk fuer Saiteninstrumente
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DE179067C
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DE165636C
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DE217016C
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DE266437C
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DE30520C
(de )
Neuerungen an Apparaten zum Wägen, Anzeigen von Kräften oder Prüfen von Materialien
DE239417C
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DE127906C
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