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发明名称
Traffic signal
摘要
申请公布号
US1797221(A)
申请公布日期
1931.03.24
申请号
US19290347015
申请日期
1929.03.14
申请人
OBERLIN CARTER THEODORE;NATHAN CARTER ALFRED
发明人
CARTER THEODORE OBERLIN;CARTER ALFRED NATHAN
分类号
G09F7/00
主分类号
G09F7/00
代理机构
代理人
主权项
地址
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