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GB255284A
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Improvements in or relating to stringed musical instruments
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US1579780A
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Stringed musical instrument
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US1582625A
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Spring-shank-hammer mechanism
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US1352618A
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Playing attachment for zithers
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US1299704A
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Keyed zither.
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US1299654A
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Keyed zither.
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US1341072A
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Keyed zither
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US1444003A
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Playing attachment for zithers
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US1373444A
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Airplane-velocipede
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US1376738A
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Inverted keyed zither
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US1246635A
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Playing device for stringed musical instruments.
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US1246058A
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Bass attachment for zithers.
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US1150284A
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Keyed zither.
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US1190929A
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Bridge-wire for stringed instruments.
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US1190784A
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Tone-softening attachment for zithers.
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US1190783A
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Keyed zither.
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US1150285A
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Keyed zither.
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US1150283A
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Playing mechanism for zithers.
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US1115865A
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Playing attachment for stringed musical instruments.
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US1190782A
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Chord-strings of a zither.
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