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公开(公告)号：US1030620A
公开(公告)日：1912-06-25
申请号：US1912684990
申请日：1912-03-20
Applicant: INTERNAT ACHESON GRAPHITE COMPANY
Inventor： SPRAGUE EDMUND C , WILLIAMSON ARTHUR M
CPC classification number: H05B3/60
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公开(公告)号：CA151171A
公开(公告)日：1913-10-21
申请号：CA151171D
申请日：1912-06-25
Applicant: WILLIAMSON ARTHUR M , SPRAGUE EDMUND C , INTERNAT ACHESON GRAPHITE COMPANY
Inventor： WILLIAMSON ARTHUR M , SPRAGUE EDMUND C
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