发明授权
- 专利标题: Protective device for blasting circuit
- 专利标题(中): 爆破电路保护装置
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申请号: US54458244申请日: 1944-07-12
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公开(公告)号: US2428334A公开(公告)日: 1947-09-30
- 发明人: LUBELSKY BENJAMIN L , HARTLINE RALPH E
- 申请人: MINE SAFETY APPLIANCES CO
- 专利权人: Mine Safety Appliances Co
- 当前专利权人: Mine Safety Appliances Co
- 优先权: US54458244 1944-07-12
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