4. Music
  5. Instruments
  6. Stringed

Robert J. Sperzel

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Apparatus for changing the tension in a string of a musical inst

Music – Instruments – Stringed
Patent

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Device for tuning a string of a musical instrument

Music – Instruments – Stringed
Reexamination Certificate

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Musical instrument

Music – Instruments – Stringed
Patent

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Musical instrument

Music – Instruments – Stringed
Reexamination Certificate

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String support

Music – Instruments – Stringed
Patent

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Profile ID: LFUS-PAI-P-1130997

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