Perpetual calendar

Details Perpetual calendar Perpetual calendar

1976-11-29

1979-01-30

Stearman, Joel

Office supplies; artists and teachers materials

Calendar or calendar holder

Perpetual

D1903

Patent

active

D02509598

REFERENCES:
patent: D226322 (1973-02-01), Wills
patent: D229356 (1973-11-01), Giorgio
patent: 1470065 (1923-10-01), Downer

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