| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 3 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | Canada | 2 | |
| #4 | China | 2 | |
| #5 | EPO (European Patent Office) | 2 | |
| #6 | Taiwan | 2 | |
| #7 | United States | 2 | |
| #8 | Indonesia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Engines, pumps and turbines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Making screws | |
| #2 | Thread cutting | |
| #3 | Internal-combustion piston engines | |
| #4 | Pumps | |
| #5 | Machines | |
| #6 | Controlling combustion engines | |
| #7 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Aoyama Tsuyoshi | 15 |
| #2 | Aoyama Susumu | 3 |
| #3 | Tsuyoshi Aoyama | 1 |
| Publication | Filing date | Title |
|---|---|---|
| KR20150032882A | Machining method for female screw and device for same | |
| TW200618888A | Method of manufacturing part with internal gear and rolling machine | |
| CN1829578A | Method of manufacturing part with internal gear and rolling machine | |
| WO2005009646A1 | Method of manufacturing part with internal gear and rolling machine |