Vertical file

Office supplies; artists and teachers materials – Office equipment not elsewhere specified – Holder or file

Patent

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Details

D19 86, D19 95

Patent

active

D03231909

REFERENCES:
patent: D115677 (1939-07-01), Ullmo
patent: D155010 (1949-08-01), Kaplan et al.
patent: D182443 (1958-04-01), Sherman
patent: D231137 (1974-04-01), Juhlin
patent: D258511 (1981-03-01), Ashton
patent: D306040 (1990-02-01), Evenson
patent: D310767 (1990-09-01), Minuti
patent: D313047 (1990-12-01), Evenson
patent: D313546 (1991-01-01), Beirise et al.

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