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公开(公告)号：US2210611A
公开(公告)日：1940-08-06
申请号：US25149539
申请日：1939-01-18
Applicant: SERVEL INC
Inventor： ERIK WIDELL NILS
IPC: F25B15/10
CPC classification number: F25B15/10 , Y02A30/277 , Y02B30/62
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公开(公告)号：US2059876A
公开(公告)日：1936-11-03
申请号：US73348434
申请日：1934-07-02
Applicant: SERVEL INC
Inventor： GEORG KOGEL WILHELM , ERIK WIDELL NILS
IPC: F25B15/10
CPC classification number: F25B15/10 , Y02A30/277 , Y02B30/62
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