Building block type writing implement

Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Plural or combined

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Details

D19 48, D19 49, 1906

Patent

active

D0422308&

REFERENCES:
patent: D285314 (1986-08-01), Galoppo
patent: D290851 (1987-07-01), Yoshida
patent: D312658 (1990-12-01), Sumino
patent: 2584908 (1952-02-01), Oblinger
patent: 4603993 (1986-08-01), Jung
patent: 4983062 (1991-01-01), Hour
patent: 5281039 (1994-01-01), Hsiung et al.
patent: 5584195 (1996-12-01), Lin

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