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经营范围
发明名称
摘要
1,167,016. Self-tapping screws. PARKERKALON CORP. 3 Nov., 1966 [3 Nov., 1965], No. 49249/66. Heading B3N. [Also in Division F2] A self-tapping screw 20 in which the underside 23 of the head is of spherical form.
申请公布号
NL6615421(A)
申请公布日期
1967.05.05
申请号
NL19660015421
申请日期
1966.11.01
申请人
发明人
分类号
F16B25/00;F16B33/00;F16B43/00;F16B43/02
主分类号
F16B25/00
代理机构
代理人
主权项
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