Underground insulated pipe system,申请号US19420443782-传众专利搜索

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发明名称	Underground insulated pipe system
摘要
申请公布号	US2355966(A)	申请公布日期	1944.08.15
申请号	US19420443782	申请日期	1942.05.20
申请人	UNIVERSAL ZONOLITE INSULATION COMPANY	发明人	GOFF DAVID C.
分类号	F16L59/15;F16L59/21	主分类号	F16L59/15
代理机构		代理人
主权项
地址

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