Method of making collar-head screws or the like.

Invention Grant

US1262975A Method of making collar-head screws or the like. 失效

Title translation: 制作螺丝钉或类似方法。

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Patent Title: Method of making collar-head screws or the like.
Patent Title (中): 制作螺丝钉或类似方法。
Application No.: US12555216

Application Date: 1916-10-14
Publication No.: US1262975A

Publication Date: 1918-04-16
Inventor: PIERCE ROBERT C
Applicant: THOMSON ELECTRIC WELDING CO
Assignee: Thomson Electric Welding Co
Current Assignee: Thomson Electric Welding Co
Priority: US12555216 1916-10-14

Method of making collar-head screws or the like.

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