Perpetual calendar

Details Perpetual calendar Perpetual calendar

1989-03-31

1990-06-19

Dorner, Kenneth J.

Card, picture, or sign exhibiting

Calendars

40124, G09F 300

Patent

active

049340760

ABSTRACT:
A perpetual calendar displaying selected faces or sides of a minimal number of parallelepiped blocks for displaying the year, the days of the month, initial numbering of the weeks of the year and the months of the year spelled out in a choice of several languages.

REFERENCES:
patent: 166796 (1875-08-01), Miller
patent: 3564741 (1971-02-01), Kahre et al.
patent: 3670436 (1972-06-01), Weissmann
patent: 4472892 (1984-09-01), Yang
patent: 4596082 (1986-06-01), Lane

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