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公开(公告)号：US1468651A
公开(公告)日：1923-09-25
申请号：US32714919
申请日：1919-09-29
Applicant: ROLLER SMITH COMPANY
Inventor： SPURRIER JOHN R
IPC: H01H73/44
CPC classification number: H01H73/44
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公开(公告)号：US1275098A
公开(公告)日：1918-08-06
申请号：US5683315
申请日：1915-10-20
Applicant: ROLLER SMITH COMPANY
Inventor： SPURRIER JOHN R
CPC classification number: H01H71/1009
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