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经营范围
发明名称
TRANSMETTEUR DE SIGNAUX.
摘要
申请公布号
CH657419(A5)
申请公布日期
1986.08.29
申请号
CH19840000087
申请日期
1981.08.26
申请人
NL SPERRY-SUN, INC.
发明人
RUSSELL, ANTHONY WILLIAM;RUSSELL, MICHAEL KING
分类号
E21B41/00;E21B47/12;E21B47/18;(IPC1-7):E21B21/08
主分类号
E21B41/00
代理机构
代理人
主权项
地址
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