Improvements in and relating to electric switch mechanisms more especially for use in controlling shot-firing in mines,申请号GB19430011649-传众专利搜索

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发明名称	Improvements in and relating to electric switch mechanisms more especially for use in controlling shot-firing in mines
摘要
申请公布号	GB566229(A)	申请公布日期	1944.12.19
申请号	GB19430011649	申请日期	1943.07.17
申请人	JOHN DAVIS AND SON (DERBY) LIMITED;CLIFFORD DAWSON	发明人
分类号	F42D1/045	主分类号	F42D1/045
代理机构		代理人
主权项
地址

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