| # | Country | Total Patents | |
|---|---|---|---|
| #1 | China | 12 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Nails |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zhang Xin | 12 |
| Publication | Filing date | Title |
|---|---|---|
| CN105909652A | Safety screw | |
| CN105864266A | Screw lock | |
| CN105909650A | Anti-theft screw | |
| CN104251253A | Self-tightening screw | |
| CN104154097A | Anti-loose set screw | |
| CN104154099A | Screw with anti-oil cap | |
| CN104152930A | Fastener pickling device | |
| CN104163255A | Bolt collection and package device | |
| CN104149082A | Machinery-handling tool cart | |
| CN104149076A | Multifunctional fastener production workbench | |
| CN104154090A | Self-loosening and self-tightening bolt structure | |
| CN104191423A | Foldable nut collection support system |