Holder for lead refills

Details Holder for lead refills Holder for lead refills

1992-07-17

1993-12-07

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 41, D19 49, D19 56

Patent

active

D03420884

REFERENCES:
patent: D238359 (1976-01-01), Zepell
patent: D263317 (1982-03-01), Swensson
patent: D268935 (1983-05-01), Horntrich
patent: D299470 (1989-01-01), Mock
patent: D302176 (1989-07-01), Belletire et al.
patent: D303992 (1989-10-01), Grotsch
patent: D308075 (1990-05-01), Yazaki
patent: 2762336 (1956-09-01), Estes
patent: 3756727 (1973-09-01), Gallagher

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