-
公开(公告)号:US1841215A
公开(公告)日:1932-01-12
申请号:US38667929
申请日:1929-08-17
申请人: SCHNEIDER BENJAMIN A
发明人: SCHNEIDER BENJAMIN A
CPC分类号: C04B41/009 , B28B11/04 , C04B41/5022 , C04B41/5361 , C04B41/86 , C04B41/91 , Y10S264/63 , C04B41/4505 , C04B41/4572 , C04B41/4578 , C04B41/53 , C04B33/00