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发明名称
Carbon saver ferrule for uncut carbon electrode sticks
摘要
申请公布号
US1997297(A)
申请公布日期
1935.04.09
申请号
US19340734624
申请日期
1934.07.11
申请人
PROJECTOR IMPROVEMENT COMPANY, INC.
发明人
FUCHS CHARLES A.
分类号
H05B31/18
主分类号
H05B31/18
代理机构
代理人
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地址
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