Invention Grant
- Patent Title: Ship-centering device
- Patent Title (中): 以船为中心的装置
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Application No.: US42733720Application Date: 1920-11-30
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Publication No.: US1407375APublication Date: 1922-02-21
- Inventor: BURBANK RALPH N
- Applicant: BURBANK RALPH N
- Assignee: Ralph N Burbank
- Current Assignee: Ralph N Burbank
- Priority: US42733720 1920-11-30
- Main IPC: B63B9/00
- IPC: B63B9/00
Information query
