Portable visual signal device for giving visual morse code signals
United States Patent 3205487
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Inventors:
Vriend, Joseph A.
Publication Date:
09/07/1965
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Assignee:
Vriend, Joseph A.
Primary Class:
340/321
Other Classes:
340/332
US Patent References:
2767390Emergency road light
3056954Portable signal device
3114906Portable flare
Foreign References:
AT204933B