Invention Grant
- Patent Title: Machinery for making welded pipe
- Patent Title (中): 焊管机械
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Application No.: US51333731Application Date: 1931-02-04
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Publication No.: US1878376APublication Date: 1932-09-20
- Inventor: LEON CAMMEN
- Applicant: LEON CAMMEN
- Assignee: Cammen Leon
- Current Assignee: Cammen Leon
- Priority: US51333731 1931-02-04
- Main IPC: B21C37/12
- IPC: B21C37/12
Information query
