Ballpoint pen

Details Ballpoint pen Ballpoint pen

1990-08-20

1992-11-24

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 48, D19 56

Patent

active

D03312607

REFERENCES:
patent: D208680 (1967-09-01), Summers
patent: D209550 (1967-12-01), Arnone
patent: D271212 (1983-11-01), Itoh
patent: D305551 (1990-01-01), Oka
patent: D306317 (1990-02-01), Petterson
patent: D318490 (1991-07-01), Klodt
patent: D319845 (1991-09-01), Grotsch et al.
patent: D323186 (1992-01-01), Clark et al.

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