Invention Grant
- Patent Title: Electromechanical traffic-signal.
- Patent Title (中): 电动交通信号。
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Application No.: US15211317Application Date: 1917-03-02
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Publication No.: US1265197APublication Date: 1918-05-07
- Inventor: HAWES HENRY W
- Applicant: HAWES HENRY W
- Assignee: Henry W Hawes
- Current Assignee: Henry W Hawes
- Priority: US15211317 1917-03-02
Public/Granted literature
- US20180018973A1 SPEAKER VERIFICATION Public/Granted day:2018-01-18
Information query
