Ball point pen

Details Ball point pen Ball point pen

1989-03-13

1991-09-10

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 43, D19 50, D19 56, D19 57

Patent

active

D03198448

REFERENCES:
patent: D138825 (1944-09-01), Waldinger
patent: D155532 (1949-10-01), Morrison
patent: D234225 (1975-01-01), Itoh
patent: D253060 (1979-10-01), Itoh
patent: D258219 (1981-02-01), Oka
patent: D283901 (1986-05-01), Hornfrich
patent: D284773 (1986-07-01), Schwartz et al.
patent: D285730 (1986-09-01), Bulwick
patent: D303992 (1989-10-01), Grotsch
patent: D312478 (1990-11-01), Lecce

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