Erasable four-color pen

Details Erasable four-color pen Erasable four-color pen

1993-02-05

1994-12-20

Thompson, Martie

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Plural or combined

D19 49, D19 51

Patent

active

D03536190

REFERENCES:
patent: D155613 (1949-10-01), Kahn
patent: D338039 (1993-08-01), Takahashi
patent: 709211 (1902-09-01), Elkan
patent: 1765151 (1930-06-01), Hansen
patent: 2926630 (1960-03-01), Csaby
patent: 4056325 (1977-11-01), Maruyama
patent: 4123179 (1978-10-01), Pacheco
patent: 4971628 (1990-11-01), Loftin
patent: 4973672 (1990-11-01), Bauer
patent: 5006171 (1991-04-01), Mecke

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