Pen

Details Pen Pen

1991-11-15

1993-05-25

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 48, D19 56, D19 57

Patent

active

D03358933

REFERENCES:
patent: D238357 (1976-01-01), DiCarlo
patent: D260532 (1981-09-01), Sakaoka
patent: D268501 (1983-04-01), Kuuckel et al.
patent: D268935 (1983-05-01), Horntrich
patent: D273395 (1984-04-01), Wilkinson
patent: D280854 (1985-10-01), Matalon
patent: D299470 (1989-01-01), Mock
patent: D303124 (1989-08-01), Li
patent: D307600 (1990-05-01), Singer
patent: D308075 (1990-05-01), Yazaki
patent: D309913 (1990-08-01), Shintani

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