Invention Grant
- Patent Title: Method for making wheels
- Patent Title (中): 轮子制作方法
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Application No.: US58333431Application Date: 1931-12-26
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Publication No.: US1994558APublication Date: 1935-03-19
- Inventor: ZERK OSCAR U
- Applicant: ZERK CORP
- Assignee: Zerk Corp
- Current Assignee: Zerk Corp
- Priority: US58333431 1931-12-26
- Main IPC: B21D53/26
- IPC: B21D53/26
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