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经营范围
发明名称
Swivel unit
摘要
申请公布号
US2684259(A)
申请公布日期
1954.07.20
申请号
US19520287716
申请日期
1952.05.14
申请人
NARAS RESEARCH, INC.
发明人
SCHWARTZ NATHAN RODNEY
分类号
F21V21/30
主分类号
F21V21/30
代理机构
代理人
主权项
地址
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