G01C 13 - Surveying specially adapted to open water, e.g. sea, lake, river or canal

Patents for G01C 13 - Surveying specially adapted to open water, e.g. sea, lake, river or canal (1,002)
02/1976
02/17/1976	US3938891 Apparatus for detecting changes in a natural ocean wave pattern
02/10/1976	US3937078 Sensing apparatus for inclinometers

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