Map display device

Details Map display device Map display device

1977-07-05

1978-08-01

Grieb, William H.

Stock material or miscellaneous articles

Composite

Of bituminous or tarry residue

428 13, G09B 2900

Patent

active

041034368

ABSTRACT:
A map display device includes a boundary defining structure having a plurality of recessed portions which define geographical areas, such as states, countries or the like. Each recessed portion is adapted to be filled with a material, native to the geographical area, such as soil, and a glass plate covers the boundary defining structure to retain the material within a recessed portion.

REFERENCES:
patent: 1668569 (1928-05-01), Murry
patent: 2199499 (1940-05-01), Kreitler
patent: 3767203 (1973-10-01), Eaker
patent: 4031643 (1977-06-01), Templeton

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