Ballpoint pen

Details Ballpoint pen Ballpoint pen

1999-09-28

2000-06-27

Holtje, Martie K.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 48, D19 49, 1906

Patent

active

D04272404

REFERENCES:
patent: D79546 (1929-10-01), Biffar
patent: D94375 (1935-01-01), Back
patent: D124725 (1941-01-01), Ornstein
patent: D145431 (1946-08-01), Flanagan
patent: D163606 (1951-06-01), Horwitch
patent: D173480 (1954-11-01), Fink
patent: D179615 (1957-01-01), Spatz
patent: D260531 (1981-09-01), Beffa
patent: D336923 (1993-06-01), Lin

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