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Class Information
Number: 84/38
Name: Music > Instruments > Automatic > Stringed > Pianos > Pneumatic type > Expression mechanism > Parts of piano moved > Rest rail shifted > Graduated shift
Description: The ends of the rest-rail may move through unequal distances, so the musical effect is graduated from bass to treble.










Patents under this class:

Patent Number Title Of Patent Date Issued











 
 
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