Writing instrument

Details Writing instrument Writing instrument

1990-10-09

1993-03-02

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 42, D19 51, D19 56, D19 57

Patent

active

D03336778

REFERENCES:
patent: D83592 (1931-03-01), Bienenstein
patent: D107438 (1937-12-01), MacNally
patent: D145431 (1946-08-01), Flanagan
patent: D186923 (1959-12-01), Williams
patent: D187315 (1960-02-01), Williams
patent: D187831 (1960-05-01), Buryan
patent: D212788 (1968-11-01), Perwas
patent: D229110 (1973-11-01), Corte

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