Marking instrument

Details Marking instrument Marking instrument

1992-08-13

1993-11-02

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

D03409473

REFERENCES:
patent: D260272 (1981-08-01), Horntrich
patent: D268935 (1983-05-01), Horntrich
patent: D309913 (1990-08-01), Shintani
patent: D311070 (1992-11-01), Hu Huang
patent: D314590 (1991-02-01), Molina
patent: D325931 (1992-05-01), Sekiguchi
patent: D329253 (1992-09-01), Sekiguchi
patent: D329873 (1992-09-01), Tu
patent: 4183685 (1980-01-01), Hofmann et al.

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