Tuning device

Music – Accessories – Tuning devices

Reexamination Certificate

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C084S455000, C084S456000

Reexamination Certificate

active

06953885

ABSTRACT:
A tuning device measures and displays a deviation between a fundamental frequency of a music signal and a standard reference frequency. The tuning device has a meter having a graduated display and a movable needle, one or both of which are provided with a fluorescent substance. An LED emits energy effective to cause the fluorescent substance to emit light to illuminate the meter display thereby making it easy to tune a musical instrument in poorly lighted or dark locations. The fluorescent substance of the graduated display may emit light of the same or a different color from that emitted by the fluorescent substance of the needle indicator.

REFERENCES:
patent: 3896697 (1975-07-01), Iannone
patent: 4081764 (1978-03-01), Christmann et al.
patent: 5777248 (1998-07-01), Campbell
patent: 6252254 (2001-06-01), Soules et al.
patent: 6319425 (2001-11-01), Tasaki et al.

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