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公开(公告)号：US2857287A
公开(公告)日：1958-10-21
申请号：US47867054
申请日：1954-12-30
Applicant: LEO KAMPF
Inventor： LEO KAMPF
CPC classification number: C04B28/02 , C04B20/12 , C04B24/085 , C04B24/383 , C04B2103/40 , C04B2111/1031 , C04B2201/10 , C04B20/1025 , C04B20/1048 , C04B20/1022 , C04B14/06 , C04B24/20 , C04B14/14 , C04B14/28
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