Tuning pen
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 15, 1991
Grant Date -
N/A
app pub date -
Oct 23, 1989
filing date -
Oct 23, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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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