发明名称 |
Building tile |
摘要 |
|
申请公布号 |
US2049882(A) |
申请公布日期 |
1936.08.04 |
申请号 |
US19350042975 |
申请日期 |
1935.09.30 |
申请人 |
GEORGE WITTY |
发明人 |
WITTY GEORGE |
分类号 |
C04B28/08;C04B28/30 |
主分类号 |
C04B28/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|
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