Perpetual digital calendar

Details Perpetual digital calendar Perpetual digital calendar

1976-08-23

1978-10-24

Stearman, Joel

Office supplies; artists and teachers materials

Calendar or calendar holder

Perpetual

D1903

Patent

active

D02500310

REFERENCES:
patent: D55629 (1920-07-01), McDade
patent: D92641 (1934-07-01), Adler, Jr.
patent: D192480 (1962-03-01), Lowe
patent: D219793 (1971-01-01), Turnbull
patent: 2186913 (1940-01-01), Jonas
patent: 3628270 (1971-12-01), Fleming

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