Rotary card file

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

Patent

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D1902

Patent

active

D02586690

REFERENCES:
patent: 2562593 (1951-07-01), Adams
patent: 2589383 (1952-03-01), Holt
patent: 3279470 (1966-10-01), Neilsen
Office Products, Oct. 1976, p. 52.
House Beautiful, 8/48, p. 100, rt. center.

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