Invention Grant
- Patent Title: Apparatus for the fabrication of ribbed structural members
- Patent Title (中): 用于制造肋状结构构件的装置
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Application No.: US28527452Application Date: 1952-04-30
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Publication No.: US2802509APublication Date: 1957-08-13
- Inventor: ANDERSON CARL R , MAHNS MAURICE W
- Applicant: ALUMINUM CO OF AMERICA
- Assignee: Aluminum Co Of America
- Current Assignee: Aluminum Co Of America
- Priority: US28527452 1952-04-30
- Main IPC: B21C23/06
- IPC: B21C23/06 ; B21D22/10
Information query
