Perpetual calendar

Details Perpetual calendar Perpetual calendar

1976-08-23

1978-10-24

Stearman, Joel

Office supplies; artists and teachers materials

Calendar or calendar holder

Perpetual

D1903

Patent

active

D02500329

REFERENCES:
patent: D189263 (1960-11-01), Reinecke
patent: D228020 (1973-07-01), Cuccio
patent: 2186913 (1940-01-01), Jonas
patent: 2774160 (1956-12-01), Gilson
patent: 3628270 (1971-12-01), Fleming

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