Invention Grant
- Patent Title: Ball-bearing tire
- Patent Title (中): 滚珠轴承轮胎
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Application No.: US73683124Application Date: 1924-09-10
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Publication No.: US1612182APublication Date: 1926-12-28
- Inventor: DUFFY MICHAEL J
- Applicant: DUFFY MICHAEL J
- Assignee: Michael J Duffy
- Current Assignee: Michael J Duffy
- Priority: US73683124 1924-09-10
- Main IPC: B60B9/20
- IPC: B60B9/20
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