Digital calendar

Details Digital calendar Digital calendar

1991-12-27

1993-07-27

Burke, Wallace R.

Office supplies; artists and teachers materials

Calendar or calendar holder

Perpetual

Patent

active

D03377857

REFERENCES:
patent: D245913 (1977-09-01), Macowski
patent: 1681235 (1928-08-01), Hiering
patent: 1753786 (1930-04-01), Hinkel
patent: 1803658 (1931-05-01), Smith
patent: 3792541 (1974-02-01), Engle, Jr.

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