Twin-nibbed writing instrument

Details Twin-nibbed writing instrument Twin-nibbed writing instrument

1989-05-18

1991-11-26

Dunkins, Bruce W.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Plural or combined

D19 43, D19 49, D19 57

Patent

active

D03219054

REFERENCES:
patent: D248661 (1978-07-01), Kanawyer
patent: D289302 (1987-04-01), Powell
patent: D306316 (1990-02-01), Shintani
patent: D312658 (1990-12-01), Sumino
patent: D312659 (1990-12-01), Oka
patent: 800587 (1905-09-01), Merriam
patent: 1463983 (1923-08-01), Visitacion
patent: 1846613 (1932-02-01), Rosenthal
patent: 3079895 (1963-03-01), Gordon
patent: 4702633 (1987-10-01), Schmidt
patent: 4902151 (1990-02-01), Asano et al.

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