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发明名称
Improvements relating to electric signalling systems
摘要
申请公布号
GB594160(A)
申请公布日期
1947.11.04
申请号
GB19450011914
申请日期
1945.05.11
申请人
SIEMENS BROTHERS & CO., LIMITED;LESLIE SPICER CRUTCH;JOHN HENRY MOLE;WILLIAM CHARLES NEWMAN
发明人
分类号
H04Q1/446
主分类号
H04Q1/446
代理机构
代理人
主权项
地址
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