Perpetual calendar

Details Perpetual calendar Perpetual calendar

1998-08-03

1999-04-20

Holtje, Martie K.

Office supplies; artists and teachers materials

Calendar or calendar holder

Perpetual

D19 20, D10 22, 1903

Patent

active

D04084462

REFERENCES:
patent: D141924 (1945-07-01), McNeill et al.
patent: D193745 (1962-10-01), Vierling
patent: D275840 (1984-10-01), Rhelts
patent: D301557 (1989-06-01), Agostini
patent: D324698 (1992-03-01), Bruns
patent: D347600 (1994-06-01), Ilaria et al.
patent: D377762 (1997-02-01), Chien
patent: 1069533 (1913-08-01), Davis
patent: 1803658 (1931-05-01), Smith

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