Echo ranging and listening gear
United States Patent 2460316
US Patent References:
Method of and apparatus for measuring distance
- - 1709573
Distance and depth finding
- - 2009459
Arrangement for the direct indication of time periods, especially for echo sounding
- - 2032893
Means for and method of generating electrical currents
- - 2103090
Apparatus for distance and depth measurement
- - 2108090
Method of and apparatus for measuring distance
- - 1709573
Distance and depth finding
- - 2009459
Arrangement for the direct indication of time periods, especially for echo sounding
- - 2032893
Means for and method of generating electrical currents
- - 2103090
Apparatus for distance and depth measurement
- - 2108090
Inventors:
Trent, Horace M.
Jones, Thomas F.
Jones, Thomas F.
Publication Date:
02/01/1949
View Patent Images:
Export Citation:
Assignee:
Trent, Horace M.
Jones, Thomas F.
Jones, Thomas F.
Primary Class:
Other Classes:
367/901, 367/137, 340/566
US Patent References:
Foreign References:
| AU118392B | ||||
| GB180646A |