Chart board

Details Chart board Chart board

1975-05-16

1976-12-21

Stearman, Joel

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Holder or file

D1999

Patent

active

D02427940

REFERENCES:
patent: 1033440 (1912-07-01), Moffat
patent: 3422547 (1969-01-01), Heine
patent: 3540127 (1970-11-01), Kane
patent: 3570445 (1971-03-01), Johnson
patent: 3787990 (1974-01-01), Silver
Globe Wernicke Systems Cat., 1967, p. 7e, Item No. 31-FS.

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