Combined twin-nibbed marker and level

Details Combined twin-nibbed marker and level Combined twin-nibbed marker and level

1991-01-16

1992-11-10

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Plural or combined

D19 51, D19 57, D19 62, D19 69, 401195

Patent

active

D03309100

REFERENCES:
patent: D92705 (1934-07-01), Deli
patent: D126555 (1941-04-01), Gurtov
patent: D159125 (1950-06-01), Wuestman
patent: D277873 (1985-03-01), Kin
patent: D279992 (1985-08-01), Gribb
patent: D286163 (1986-10-01), Shintani
patent: D306316 (1990-02-01), Shintani
patent: D306873 (1990-03-01), Yazaki
patent: D324542 (1992-03-01), Lin

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