Invention Grant
- Patent Title: Manufacture of headers or return bends
- Patent Title (中): 头部或弯头的制造
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Application No.: US71608034Application Date: 1934-03-17
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Publication No.: US2007649APublication Date: 1935-07-09
- Inventor: HOPKINS ROBERT K
- Applicant: KELLOGG M W CO
- Assignee: Kellogg M W Co
- Current Assignee: Kellogg M W Co
- Priority: US71608034 1934-03-17
- Main IPC: B21C37/28
- IPC: B21C37/28
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