Process for manufacturing ball pen points by extrusion and drawing starting from a wire |
|||||||
| 申请号 | US3470603D | 申请日 | 1966-11-28 | 公开(公告)号 | US3470603A | 公开(公告)日 | 1969-10-07 |
| 申请人 | PIETRO AZZARITI; | 发明人 | AZZARITI PIETRO; | ||||
| 摘要 | |||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈