| 发明名称 |
Sharpener for phillipshead screwdrivers |
| 摘要 |
The invention will sharpen worn phillipshead screwdrivers. The invention contains four files that fit into the grooves of a phillipshead screwdriver. The worn phillipshead screwdriver is sharpened when the worn phillipshead screwdriver is moved in-and-out of the invention.
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| 申请公布号 |
US4590651(A) |
申请公布日期 |
1986.05.27 |
| 申请号 |
US19850757479 |
申请日期 |
1985.07.22 |
| 申请人 |
ROBERTS, JOSEPH D. |
发明人 |
ROBERTS, JOSEPH D. |
| 分类号 |
B23D71/08;B24D15/00;(IPC1-7):B23D71/08 |
主分类号 |
B23D71/08 |
| 代理机构 |
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