Improvements in helmets for aviators,申请号GB19290021348-传众专利搜索

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发明名称	Improvements in helmets for aviators
摘要
申请公布号	GB336286(A)	申请公布日期	1930.10.13
申请号	GB19290021348	申请日期	1929.07.11
申请人	GRAHAM AMPLION LIMITED;DUNCAN SINCLAIR	发明人
分类号	A42B3/30	主分类号	A42B3/30
代理机构		代理人
主权项
地址

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