Invention Grant
- Patent Title: Door silencer
- Patent Title (中): 门消声器
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Application No.: US56387822Application Date: 1922-05-26
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Publication No.: US1520199APublication Date: 1924-12-23
- Inventor: MORGAN ROBERT P
- Applicant: MORGAN ROBERT P
- Assignee: Robert P Morgan
- Current Assignee: Robert P Morgan
- Priority: US56387822 1922-05-26
- Main IPC: E05F5/04
- IPC: E05F5/04
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