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Class Information
Number: 33/380
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive > Liquid type, upper surface utilizing > Bubble > Adjustable size
Description: Device provided with means for quantitatively changing the bubble simulating space.

Patents under this class:

Patent Number Title Of Patent Date Issued
7784193 Airlessly sealed vial Aug. 31, 2010

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