Ballpoint pen

Details Ballpoint pen Ballpoint pen

1992-05-15

1993-11-30

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 41, D19 55

Patent

active

D03418510

REFERENCES:
patent: D93133 (1934-08-01), Robbins
patent: D142361 (1945-09-01), Hanle
patent: D153679 (1949-05-01), Gruber
patent: D200510 (1965-03-01), Fehling et al.
patent: D200511 (1965-03-01), Fehling et al.
patent: D200560 (1965-03-01), Rhoades
patent: D275577 (1884-09-01), Hechter

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