Twin-nibbed marking pen

Details Twin-nibbed marking pen Twin-nibbed marking pen

1987-05-11

1990-03-27

Vales-Lado, Carmen H.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Plural or combined

D19 43, D19 48, D19 57

Patent

active

D03068730

REFERENCES:
patent: D279992 (1985-08-01), Gribb
patent: D295537 (1988-05-01), Davidson et al.
patent: D295878 (1988-05-01), Lovell
patent: D300640 (1989-04-01), Coletta et al.
patent: 1495890 (1924-05-01), Day
patent: 3684389 (1972-08-01), Eron et al.
patent: 3765780 (1973-10-01), Guu et al.
patent: 4509875 (1985-04-01), Shintani
patent: 4557618 (1985-12-01), Iwata et al.
Visual Systems Co. Inc. catalog .COPYRGT.1985, see p. 125, top left, Berol Double Ended Marker.

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