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Patents

一种可缩井壁装置

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Disigner of the Invention:huangjiahui,renyanlong,wangyansen,songlei

Note:黄家会,任彦龙,王衍森,宋雷

Type of Patent:国际

State of Patent:专利撤回

Application Number:02286442.3

Authorization number:CN 2585977Y

Number of Inventors:5

Service Invention or Not:no

Application Date:2002-12-02

Authorization Date:2003-11-12

First Author:yangweihao