Electro-mechanical sign structure with alternating faces formed

Details Electro-mechanical sign structure with alternating faces formed Electro-mechanical sign structure with alternating faces formed

1974-10-01

1977-01-11

Jackmon, E. S.

40 777, 58125R, G04B 1900, G09F 1102, G04B 1902

Patent

active

040020223

ABSTRACT:
An electro-mechanical sign which alternatively exhibits two different kinds of information, for example clock or sign display information, on two respective faces of several adjacent dihedral angles.

REFERENCES:
patent: 2277323 (1942-03-01), Hjernstad et al.
patent: 2677205 (1954-05-01), Wyatt

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