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Oh; Byoung-Geun
Daejeon, KR
No. of patents:

Patent Number Title Of Patent Date Issued
7258782 Apparatus for sampling filter layer and method using the same August 21, 2007
An apparatus for sampling a filter layer and a method using the same are disclosed herein. The apparatus includes a cylindrical tube made of a transparent material; a screw installed at a central portion in the cylindrical tube, to be rotated for shifting a sample from the lower part

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