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公开(公告)号：US2261307A
公开(公告)日：1941-11-04
申请号：US25639539
申请日：1939-02-14
Applicant: GEORGE STILL WILLIAM
Inventor： GEORGE STILL WILLIAM
CPC classification number: E04B1/80 , F25D23/06 , F25D2201/1282 , Y10T428/1234 , Y10T428/12347 , Y10T428/12361 , Y10T428/1241 , Y10T428/24281 , Y10T428/24314 , Y10T428/24777
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