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发明名称
Compressional wave telemetering device
摘要
申请公布号
US2656458(A)
申请公布日期
1953.10.20
申请号
US19510249204
申请日期
1951.10.01
申请人
JOHNSTON JOSEPH M;OLSEN JOSEPH B;MOULDEN JOHN A
发明人
JOHNSTON JOSEPH M.;OLSEN JOSEPH B.;MOULDEN JOHN A.
分类号
H03C7/02
主分类号
H03C7/02
代理机构
代理人
主权项
地址
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