Perpetual or long life calendar

Details Perpetual or long life calendar Perpetual or long life calendar

1978-04-18

1980-05-06

Bell, Paul A.

Printed matter

Calendar

Multiple book

40107, 40119, G09D 300, B42D 504

Patent

active

042014050

ABSTRACT:
The useful life of a calendar is extended by reusing all portions which repeat from year to year. The calendar assembly consists of two separately bound groups of pages: one bearing the names of the months and the other bearing the various combinations of days of the month, arranged in such a manner that the calendar is easy to use and has the minimum number of sheets of paper used in its construction.

REFERENCES:
patent: 868878 (1907-10-01), Marshman
patent: 959479 (1910-05-01), Doolittle
patent: 1236974 (1917-08-01), Orth
patent: 1494133 (1924-05-01), Ringler
patent: 1798656 (1931-03-01), Chapman
patent: 2160104 (1939-05-01), Kalow

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