Twin-nibbed ball-point pen

Details Twin-nibbed ball-point pen Twin-nibbed ball-point pen

1990-04-05

1992-08-25

Walsh, Donald P.

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

D03289176

REFERENCES:
patent: D103570 (1937-03-01), Hauton
patent: D114530 (1939-05-01), Deli et al.
patent: D151233 (1948-10-01), Goessling
patent: D155285 (1949-09-01), Green et al.
patent: D166161 (1952-03-01), Hanle
patent: D169307 (1953-04-01), Ferber
patent: D206735 (1967-01-01), Levy
patent: D284676 (1986-07-01), Malm
patent: D306316 (1990-02-01), Shintani
patent: D310542 (1990-09-01), Regnault
patent: D318688 (1991-07-01), Regnault

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