Writing instrument cap

Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Element or attachment

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Details

D19 51, D19 56, D11 1

Patent

active

D03369234

REFERENCES:
patent: D36798 (1904-02-01), Schmitz
patent: D79546 (1929-10-01), Biffar
patent: D130443 (1941-11-01), Gower
patent: D164976 (1951-10-01), Aversa
patent: D173480 (1954-11-01), Fink
patent: D179615 (1957-01-01), Spatz
patent: D182508 (1958-04-01), Engelmann
patent: D269684 (1983-07-01), Luntz
patent: D312096 (1990-11-01), Vitrac
patent: D331422 (1992-12-01), Weilert

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