Office supplies; artists and teachers materials – Office equipment not elsewhere specified
Patent
1977-06-03
1980-04-01
Stearman, Joel
Office supplies; artists and teachers materials
Office equipment not elsewhere specified
D19 99, D1999
Patent
active
D02546230
REFERENCES:
patent: 992255 (1911-05-01), Rittenhouse
patent: 1303279 (1919-05-01), Fisher
patent: 2323393 (1943-07-01), Hartmann
Ross Karl F.
Stearman Joel
Word George P.
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