Improvements in or relating to pressure-operated contact devices for railways, especially for railway signalling and level crossing operating systems,申请号GB19340015261-传众专利搜索

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发明名称	Improvements in or relating to pressure-operated contact devices for railways, especially for railway signalling and level crossing operating systems
摘要
申请公布号	GB421329(A)	申请公布日期	1934.12.18
申请号	GB19340015261	申请日期	1934.05.22
申请人	VACLAV BARBORA;JOSEF FRYBA	发明人
分类号	B61L1/04	主分类号	B61L1/04
代理机构		代理人
主权项
地址

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