Language : English
周福宝

Patents

一种瓦斯抽放钻孔的二次封孔装置

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Disigner of the Invention:张仁贵,昃玺,刘应科,姜铁明,王军

Note:张仁贵,昃玺,刘应科,姜铁明,王军

Type of Patent:国际

State of Patent:专利撤回

Application Number:200820035092.7

Authorization number:CN 201193533Y

Number of Inventors:6

Service Invention or Not:no

Application Date:2008-04-10

Authorization Date:2009-02-11

First Author:周福宝