EXTENSION-BRACKET FOR PIANO-ACTIONS

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Bibliographic Details
Main Author FREDERICK CHRISTOPHER BILLINGS
Format Patent
LanguageEnglish
Published 22.02.1910
Subjects
ACOUSTICS
MUSICAL INSTRUMENTS
PHYSICS
PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICALINSTRUMENTS WITH ONE OR MORE KEYBOARD
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Bibliography:Application Number: US19080453009