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公开(公告)号：CA286561A
公开(公告)日：1929-01-15
申请号：CA286561D
Applicant: BROOKS JOSHUA TWING , SKOWRON EDMUND A
Inventor： SKOWRON EDMUND A , BROOKS JOSHUA TWING
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公开(公告)号：US1682478A
公开(公告)日：1928-08-28
申请号：US25965328
申请日：1928-03-07
Applicant: BROOKS
Inventor： TWING BROOKS JOSHUA , SKOWRON EDMUND A
IPC: E01B13/02
CPC classification number: E01B13/02 , E01B2201/08
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