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公开(公告)号：US1390997A
公开(公告)日：1921-09-20
申请号：US43504721
申请日：1921-01-04
Applicant: EASTERN MFG COMPANY
Inventor： LITTLE ARTHUR L , VEROW GEORGE W
IPC: H05B1/02
CPC classification number: D21H23/32 , D21H5/0005 , D21H21/16 , D21H23/56
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