Music – Accessories – Teaching devices
Patent
1989-10-23
1991-01-15
Franklin, Lawrence R.
Music
Accessories
Teaching devices
84456, G10G 104
Patent
active
049844946
ABSTRACT:
This invention is a Tuning Pen which can serve as a writing apparatus and tuning device as well as a device for checking notes of the scale corresponding to a specific key signature. According to the present invention, the pen holder which has a tuning flute mounted thereon includes a bigger cylinder which has key signatures printed thereon and is coupled with a smaller cylinder which has the notes of the scale printed thereon and is covered with a revolving sleeve which has an opening made thereon to display the note of the scale printed on the smaller cylinder.
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patent: 2792992 (1957-05-01), Ellison
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patent: 3001435 (1961-09-01), Duffy et al.
patent: 3123291 (1964-03-01), Madry
patent: 3185016 (1965-05-01), Stinson et al.
patent: 4371278 (1983-02-01), Joo
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