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矿用声光报警器

  • Release time:2020-10-30
  • Hits:

  • Disigner of the Invention: 

    李仁庆,赵文婷,赵晨旭

  • Type of Patent: 

    国际

  • State of Patent: 

    专利授权

  • Application Number: 

    201721295526.2

  • Number of Inventors: 

    4

  • Service Invention or Not: 

    no

  • Application Date: 

    2017-10-09

  • Authorization Date: 

    2018-05-15

  • First Author: 

    xiajunwu
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