Title:
Illuminated paging device
United States Patent 2644935
US Patent References:
/1236647.html
- - 1236647

/1241965.html
- - 1241965

Seat signal
- - 1554469

Traffic signal
- - 1951431


Inventors:
Greenwald, Max H.
Publication Date:
07/07/1953
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Assignee:
RICHMOND PRODUCTS COMPANY
Primary Class:
340/321
Other Classes:
40/555, 40/546, 340/815.530
International Classes:
G09F13/18