Invention Grant
- Patent Title: Apparatus for forming closed tubes
- Patent Title (中): 用于形成封闭管的装置
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Application No.: US36531340Application Date: 1940-11-12
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Publication No.: US2309181APublication Date: 1943-01-26
- Inventor: FRANCK GEORGE E
- Applicant: IMP BRASS MFG CO
- Assignee: Imp Brass Mfg Co
- Current Assignee: Imp Brass Mfg Co
- Priority: US36531340 1940-11-12
- Main IPC: B21D41/04
- IPC: B21D41/04 ; B21D51/00
Information query
