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保存失败
公开(公告)号:US2933981A
公开(公告)日:1960-04-26
申请号:US38846653
申请日:1953-10-26
申请人: ANDERSON PAUL E , CROMP THEODORE Q , EVANS PAUL I , MAURICE RANSOM
发明人: ANDERSON PAUL E , CROMP THEODORE Q , EVANS PAUL I , MAURICE RANSOM
IPC分类号: F41A9/04 , F41A9/49 , F41A9/50 , F41A9/76 , F41A19/58 , F41A23/24 , F41A23/34 , F41A23/42
CPC分类号: F41A9/30 , F41A9/04 , F41A9/49 , F41A9/50 , F41A9/76 , F41A19/58 , F41A23/24 , F41A23/34 , F41A23/42