Acoustic corrective material,申请号US19330688772-传众专利搜索

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发明名称	Acoustic corrective material
摘要
申请公布号	US1999371(A)	申请公布日期	1935.04.30
申请号	US19330688772	申请日期	1933.09.09
申请人	UNITED STATES GYPSUM COMPANY	发明人	PARSONS JOSEPH R.
分类号	E04B1/84;E04B1/86	主分类号	E04B1/84
代理机构		代理人
主权项
地址

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