Dual tip marking instrument

Details Dual tip marking instrument Dual tip marking instrument

1983-04-06

1985-08-06

Word, George P.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 36, D19 51

Patent

active

D02799928

REFERENCES:
patent: D141850 (1945-07-01), Sanders
patent: D158051 (1950-04-01), Compas
patent: D220296 (1971-03-01), Berlin
patent: D256135 (1980-07-01), Storms
patent: 3969028 (1976-07-01), Negreiros

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