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公开(公告)号：US830736A
公开(公告)日：1906-09-11
申请号：US1902321503
申请日：1902-09-12
Applicant: STANDARD SCREW
Inventor： PEARSON WALTER B
CPC classification number: B23D77/042 , B23B51/101 , Y10T279/1981 , Y10T408/852 , Y10T408/8583
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公开(公告)号：US827660A
公开(公告)日：1906-07-31
申请号：US1904229031
申请日：1904-10-18
Applicant: STANDARD SCREW
Inventor： PEARSON WALTER B , ROBERTS CHARLES E
CPC classification number: B65H20/18
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