发明授权
- 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
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申请号: US16522437申请日: 1937-09-22
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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
公开/授权文献
- US11162527B2 Ball and socket joint for device enclosure 公开/授权日:2021-11-02
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