Title:
Echo ranging and listening gear
United States Patent 2460316
Inventors:
Trent, Horace M.
Jones, Thomas F.
Publication Date:
02/01/1949
Export Citation:
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Assignee:
Trent, Horace M.
Jones, Thomas F.
Primary Class:
367/107
Other Classes:
340/566, 367/137, 367/901
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US Patent References:
2329570Device for regulating the sensitivity of signal receiving apparatus
2284850Speed indicating apparatus
2235385Welding method and apparatus
2131993Sonic depth and height indicator
2108090Apparatus for distance and depth measurement
2103090Means for and method of generating electrical currents
2032893Arrangement for the direct indication of time periods, especially for echo sounding
2009459Distance and depth finding
1709573Method of and apparatus for measuring distance
Foreign References:
AU118392B
GB180646A