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PERTECH RESOURCES INC
US
3 patents
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US8018632B2
Sep 13, 2011
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PERTECH RESOURCES INC
7 citations
70
US7824119B2
Nov 2, 2010
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PERTECH RESOURCES INC
0 citations
37
USD580487S
Nov 11, 2008
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PERTECH RESOURCES INC
0 citations
33