Electrical musical instrument
作者： Paul Les
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lens.org 参考文章(6)
James D Webster, Bridge for stringed musical instruments having means for adjusting the spacing of the strings ,(1957)
Harker William Ernest, Combination electrical pickup and bridge for guitars and other instruments ,(1946)
Armond Harry De, Individual magnet adjustable pickup ,(1950)
Benjamin F Miessner, Apparatus for the production of music ,(1932)
Lawrence P Allers, Bridge for stringed musical instruments ,(1952)
Floyd A Firestone, Ernest J Abbott, Harvard B Vincent, Vibration responsive apparatus ,(1929)