Perpetual calendar

Details Perpetual calendar Perpetual calendar

1976-09-24

1979-06-26

Stearman, Joel

Office supplies; artists and teachers materials

Calendar or calendar holder

D19 25, D19 27, D1903

Patent

active

D02522128

REFERENCES:
patent: D124708 (1941-01-01), Brown
patent: D138713 (1944-09-01), Klein et al.
patent: 3275343 (1966-09-01), Holm

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