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发明名称
Highway gate
摘要
申请公布号
US1874926(A)
申请公布日期
1932.08.30
申请号
US19310579150
申请日期
1931.12.05
申请人
AUTOMATIC SAFETY SIGNAL GATE CO.
发明人
DILLEY MORRIS MACDONALD;FRASER JAMES H.
分类号
B61L29/02
主分类号
B61L29/02
代理机构
代理人
主权项
地址
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