Ball point pen

Details Ball point pen Ball point pen

1992-12-07

1994-03-29

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 50, D19 51, D19 56

Patent

active

D03455777

REFERENCES:
patent: D284773 (1986-07-01), Schwartz et al.
patent: D306458 (1990-03-01), Lecce
patent: D318490 (1991-07-01), Klodt
patent: D319844 (1991-09-01), Grotsch et al.
patent: D319845 (1991-09-01), Grotsch et al.
patent: D321719 (1991-11-01), Nitta
patent: D323186 (1992-01-01), Clark et al.
patent: D329660 (1992-09-01), Yamanaka

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