Invention Grant
- Patent Title: Device to open doors.
- Patent Title (中): 设备打开门。
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Application No.: US1906333637Application Date: 1906-09-07
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Publication No.: US854262APublication Date: 1907-05-21
- Inventor: YOUNG JAMES M
- Applicant: W J YOUNG , YOUNG JAMES M
- Assignee: W J Young,James M Young
- Current Assignee: W J Young,James M Young
- Priority: US1906333637 1906-09-07
Information query
