Improvements relating to the ventilation of headwear, such as helmets,申请号GB19390011905-传众专利搜索

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发明名称	Improvements relating to the ventilation of headwear, such as helmets
摘要
申请公布号	GB529716(A)	申请公布日期	1940.11.27
申请号	GB19390011905	申请日期	1939.04.20
申请人	SIDNEY GEOFFREY YOUNG	发明人
分类号	A42C5/04	主分类号	A42C5/04
代理机构		代理人
主权项
地址

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