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发明名称
Screw head
摘要
This new screw head consists of a recess resembling a double dove tail design. It is capable of receiving a conventional twist bit. Its primary purposes are to increase safety and expediency.
申请公布号
US2009169333(A1)
申请公布日期
2009.07.02
申请号
US20090319769
申请日期
2009.01.12
申请人
发明人
STEWART MEARL WILSON
分类号
F16B23/00
主分类号
F16B23/00
代理机构
代理人
主权项
地址
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