Improvements in building blocks,申请号GB19380007025-传众专利搜索

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发明名称	Improvements in building blocks
摘要
申请公布号	GB522300(A)	申请公布日期	1940.06.14
申请号	GB19380007025	申请日期	1939.03.30
申请人	WALTER HENRY FREEMAN	发明人
分类号	E04B1/41	主分类号	E04B1/41
代理机构		代理人
主权项
地址

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