Mechanical pencil

Details Mechanical pencil Mechanical pencil

2000-01-28

2000-09-05

Holtje, Martie K.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 51, D19 56, 1906

Patent

active

D04306074

REFERENCES:
patent: D363084 (1995-10-01), Hollington
patent: D377051 (1996-12-01), Takemura
patent: D387804 (1997-12-01), Izushima
patent: D395447 (1998-06-01), Izushima
patent: D401624 (1998-11-01), Sakuno
patent: D413927 (1999-09-01), Izushima
patent: D417891 (1999-12-01), Izushima
patent: D418163 (1999-12-01), Rosen

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