Invention Grant
- Patent Title: Spring door-closer.
- Patent Title (中): 弹簧门关闭。
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Application No.: US1913805097Application Date: 1913-12-06
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Publication No.: US1094306APublication Date: 1914-04-21
- Inventor: CROSS JOHN A
- Applicant: CROSS JOHN A
- Assignee: John A Cross
- Current Assignee: John A Cross
- Priority: US1913805097 1913-12-06
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