Ball-point pen tip

Details Ball-point pen tip Ball-point pen tip

1992-03-25

1993-10-19

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Element or attachment

D19 51, D19 54

Patent

active

D03404773

REFERENCES:
patent: D28838 (1898-06-01), Fairchild
patent: D130436 (1941-11-01), Nissen, Jr.
patent: D157918 (1950-03-01), Stewart
patent: D196993 (1963-11-01), Green
patent: D333152 (1993-02-01), Anavil et al.
patent: 2956298 (1960-10-01), Jagtenberg
patent: 3729269 (1973-04-01), Koeln
patent: 3977798 (1976-08-01), Kuparinen
patent: 4145148 (1979-03-01), Fukuoka
patent: 4311403 (1982-01-01), Liguori
patent: 4789263 (1988-12-01), Germann

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