Marking instrument

Details Marking instrument Marking instrument

1991-03-15

1993-02-02

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 46, D19 51, D19 56

Patent

active

D03329640

REFERENCES:
patent: D26395 (1896-12-01), Kraus
patent: D137660 (1944-04-01), Severy
patent: D152717 (1949-02-01), Metzler
patent: D186149 (1959-09-01), Schier
patent: D204527 (1966-04-01), Bich
patent: D218491 (1970-08-01), Bovin et al.
patent: D218492 (1970-08-01), Bich
patent: D307035 (1990-04-01), Petterson
patent: D313246 (1990-12-01), Porsche

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