Invention Grant
- Patent Title: Method of rolling tubes with internally thickened ends
- Patent Title (中): 用内部加厚端轧制管子的方法
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Application No.: US48363030Application Date: 1930-09-22
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Publication No.: US1898779APublication Date: 1933-02-21
- Inventor: LUDWIG KLEIN
- Applicant: VEREINIGTE STAHLWERKE AG
- Assignee: Vereinigte Stahlwerke Ag
- Current Assignee: Vereinigte Stahlwerke Ag
- Priority: DE1898779X 1930-02-08
- Main IPC: B21B21/00
- IPC: B21B21/00
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