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公开(公告)号：US2547521A
公开(公告)日：1951-04-03
申请号：US6809748
申请日：1948-12-30
Applicant: BELL TELEPHONE LABOR INC
Inventor： ERNEST BUEHLER
IPC: B01J3/04
CPC classification number: B01J3/048 , Y10S425/026 , Y10T117/1096
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公开(公告)号：US2785058A
公开(公告)日：1957-03-12
申请号：US28476852
申请日：1952-04-28
Applicant: BELL TELEPHONE LABOR INC
Inventor： ERNEST BUEHLER
IPC: C01B33/12
CPC classification number: C01B33/12 , Y10S65/08 , Y10T117/1096
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公开(公告)号：US2768914A
公开(公告)日：1956-10-30
申请号：US23440851
申请日：1951-06-29
Applicant: BELL TELEPHONE LABOR INC
Inventor： ERNEST BUEHLER , TEAL GORDON K
CPC classification number: Y10S438/925
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