Writing instrument

Details Writing instrument Writing instrument

2010-01-04

2010-10-12

Walczak, David J (Department: 3751)

Coating implements with material supply

Combined

Reexamination Certificate

active

07811020

ABSTRACT:
The writing instrument comprises a first hollow tube body, a second hollow tube body and a refill. The first hollow tube body comprises a passing hole. The second hollow tube body comprises a protrusion end to correspondingly, tightly fit with the first hollow tube body, and an air inlet at the other end. The first hollow tube body comprises scale holes, at least two semitone holes near the passing hole, first air outlets, the first air outlets being between the two semitone holes. The second hollow tube body further comprises a second air outlet. Via combination of the first hollow tube body and the second hollow tube body, different tones are generated by covering the scale holes and the semitone holes. The refill can be disposed into the writing instrument, and a nib of the refill can protrude outside of the writing instrument from the passing hole.

REFERENCES:
patent: 256738 (1882-04-01), Reckendorfer et al.
patent: 4371278 (1983-02-01), Joo
patent: 5826998 (1998-10-01), Shih
patent: 5967686 (1999-10-01), Melnick

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