Letter tray

Details Letter tray Letter tray

1988-05-20

1991-08-27

Holtje, Nelson C.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Holder or file

D19 86, D19 91, D19 95

Patent

active

D03194736

REFERENCES:
patent: D154300 (1949-06-01), Morris
patent: D191133 (1961-08-01), Marx, Sr.
patent: D226892 (1973-05-01), Degennaro et al.
patent: D229108 (1973-11-01), Grosse
patent: D266129 (1982-09-01), Lidstrom
patent: D269017 (1983-05-01), Martin
patent: D272637 (1984-02-01), Barbieri et al.
patent: D296706 (1988-07-01), Evans
patent: D300152 (1989-03-01), Levenberg
patent: D309918 (1990-08-01), Evenson
patent: D310108 (1990-08-01), Rittenhouse

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