Protective end cap for a ball point pen

Details Protective end cap for a ball point pen Protective end cap for a ball point pen

1986-09-26

1990-05-15

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Element or attachment

D19 41

Patent

active

D03079201

REFERENCES:
patent: Re25813 (1965-06-01), Shea
patent: D152206 (1948-12-01), Most
patent: D168227 (1952-11-01), Kather
patent: D187496 (1960-03-01), Hirata
patent: D290851 (1987-07-01), Yoshida
patent: 2312069 (1943-02-01), Baumgartner
patent: 2354402 (1941-04-01), Petruccione et al.
patent: 2627227 (1953-02-01), Clagett et al.
patent: 4562923 (1986-01-01), Katada et al.

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