发明授权
US2215943A Method for the production of hollow bodies closed at one side by punching of four-edged blocks 失效
通过冲压四边形块来生产一侧闭合的中空体的方法

  • 专利标题: Method for the production of hollow bodies closed at one side by punching of four-edged blocks
  • 专利标题(中): 通过冲压四边形块来生产一侧闭合的中空体的方法
  • 申请号: US16522437
    申请日: 1937-09-22
  • 公开(公告)号: US2215943A
    公开(公告)日: 1940-09-24
  • 发明人: RUDOLF TRAUT
  • 申请人: RUDOLF TRAUT
  • 专利权人: Traut Rudolf
  • 当前专利权人: Traut Rudolf
  • 优先权: DE2215943X 1936-11-07
  • 主分类号: B21J9/04
  • IPC分类号: B21J9/04
Method for the production of hollow bodies closed at one side by punching of four-edged blocks
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