Perpetual calendar

Details Perpetual calendar Perpetual calendar

1999-10-01

2000-07-04

Holtje, Martie K.

Office supplies; artists and teachers materials

Calendar or calendar holder

Perpetual

D19 20, 1903

Patent

active

D04276310

REFERENCES:
patent: D233521 (1974-11-01), Morris
patent: D246048 (1977-10-01), Damman
patent: D279689 (1985-07-01), Fedor
patent: 476263 (1892-06-01), Guidinger
patent: 1611538 (1926-12-01), Landman
patent: 3991499 (1976-11-01), Otuki

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