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公开(公告)号：US1878818A
公开(公告)日：1932-09-20
申请号：US42245730
申请日：1930-01-21
Applicant: PITTSBURGH PLATE GLASS CO
Inventor： FREDRICK BURDETT CLARENCE , WILLIAM OWEN
IPC: C03B33/023 , C03B33/12
CPC classification number: C03B33/0235 , C03B33/12
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公开(公告)号：US1999586A
公开(公告)日：1935-04-30
申请号：US65009233
申请日：1933-01-04
Applicant: PITTSBURGH PLATE GLASS CO
Inventor： FREDRICK BURDETT CLARENCE , WILLIAM OWEN
IPC: C03B33/023 , C03B33/12
CPC classification number: C03B33/0235 , B65G2249/04 , C03B33/12
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