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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0346581 (1989-05-02) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 10 인용 특허 : 2 |
A threaded fastener organization is set forth wherein an axially threaded shank includes an enlarged overlying head wherein the head is provided with a square prismatic recess formed through an upper surface of the head and wherein the recess is formed with planar walls, each aligned parallel to the
A threaded fastener comprising, an axially aligned threaded shank of a finite length including an enlarged drive head integrally secured to an upper end of the threaded shank wherein the drive head includes a prismatic cavity axially aligned with the threaded shank and directed through an upper plan
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