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公开(公告)号：US2857324A
公开(公告)日：1958-10-21
申请号：US58662956
申请日：1956-05-22
Applicant: DE BOISBLANC DESLONDE R , THOMAS MARION E , JONES ROBERT M , HANSON GEORGE H , WEBSTER JULIAN W , LEYSE CARL F
Inventor： DE BOISBLANC DESLONDE R , THOMAS MARION E , JONES ROBERT M , HANSON GEORGE H , WEBSTER JULIAN W , LEYSE CARL F
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