Combination writing instrument

Coating implements with material supply – Plural exposed tools each with individual supply – Side-by-side

Reexamination Certificate

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Details

C401S029000

Reexamination Certificate

active

07147392

ABSTRACT:
A writing instrument, which has an inner and outer writing element with separate writing medium reservoirs. The writing elements are coaxially mounted in an outer barrel and axially moveable with respect to one another. A driving mechanism may be actuated to allow a user to selectively extend one writing element. The inner and outer writing elements may have an inner sleeve therebetween to improve, for instance, rigidity of the outer writing element and to prevent contamination of the writing medium reservoirs. An outer sleeve may also be provided over the outer writing element. The outer sleeve can function to hold various components of the outer writing element together, and to allow for clean and easy refill of the outer writing element, especially when the outer writing element is a porous nib with a filler-type writing medium reservoir. The writing instrument is designed so that a user can replace the inner and/or outer writing elements when their respective writing medium have been expended.

REFERENCES:
patent: 1533162 (1925-04-01), Chesne
patent: 1738367 (1929-12-01), Haught
patent: 1827311 (1931-10-01), Felipe
patent: 3083690 (1963-04-01), Marban
patent: 3247828 (1966-04-01), Basham
patent: 3336909 (1967-08-01), Diamond
patent: 3687562 (1972-08-01), Basham
patent: 4352579 (1982-10-01), Yi
patent: 4533271 (1985-08-01), Sansevero
patent: 4580918 (1986-04-01), Baker et al.
patent: 5026189 (1991-06-01), Keil
patent: 5203638 (1993-04-01), Redmond, Jr.
patent: 5611687 (1997-03-01), Wagner
patent: 8034195 (1996-02-01), None
patent: WO 02/064379 (2002-08-01), None

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