Invention Grant
- Patent Title: Route indicating device
- Patent Title (中): 路线指示装置
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Application No.: US18685138Application Date: 1938-01-25
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Publication No.: US2144949APublication Date: 1939-01-24
- Inventor: SIMPSON WEST HAROLD
- Applicant: SIMPSON WEST HAROLD
- Assignee: West Harold Simpson
- Current Assignee: West Harold Simpson
- Priority: GB2144949X 1937-02-05
- Main IPC: G01C22/00
- IPC: G01C22/00
Public/Granted literature
- US20240393820A1 KNOB ASSEMBLY AND ELECTRONIC DEVICE COMPRISING SAME Public/Granted day:2024-11-28
Information query
