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发明名称
Acoustic material
摘要
申请公布号
US2049832(A)
申请公布日期
1936.08.04
申请号
US19340719981
申请日期
1934.04.10
申请人
DANIEL CAMPBELL
发明人
DEAN JOHN
分类号
C04B14/40;C04B26/04;E04B1/74;E04B1/82;E04F13/02
主分类号
C04B14/40
代理机构
代理人
主权项
地址
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