Tuning pen
US4984494A · kind A · utility
7Cited by
12References
1Claims
0Family size
Inventor
Key dates
| Filing date | Oct 23, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Oct 23, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10G7/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.