Double writing instrument

Details Double writing instrument Double writing instrument

2000-03-08

2001-03-27

Holtje, Martie K. (Department: 2913)

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Plural or combined

CD19S051000, CD19S055000

Design Patent

active

D0439611

CLAIM:
The ornamental design for a double writing instrument, as shown and described.

REFERENCES:
patent: D. 300640 (1989-04-01), Coletta et al.
patent: D. 306316 (1990-02-01), Shintani
patent: D. 366279 (1996-01-01), Voorhees
patent: D. 370088 (1996-05-01), Burns
patent: D. 412531 (1999-08-01), Blair
patent: 1762554 (1930-06-01), Hume
patent: 3161904 (1964-12-01), Goldich
patent: 3684389 (1972-08-01), Eron et al.

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