| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 8 | |
| #2 | United States | 7 | |
| #3 | WIPO (World Intellectual Property Organization) | 5 | |
| #4 | China | 4 | |
| #5 | Taiwan | 3 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Control | |
| #3 | Semiconductors | |
| #4 | Machines | |
| #5 | Machine tools | |
| #6 | Surface technology and coating | |
| #7 | Chemical engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nagai Hideaki | 17 |
| #2 | Tadokoro Takayuki | 6 |
| #3 | Ito Ichio | 6 |
| #4 | Sawahata Tomohiro | 5 |
| #5 | Saitoh Katsuyuki | 4 |
| #6 | Hisae Takashi | 4 |
| #7 | Ikeda Mitsuhiro | 4 |
| #8 | Iwamoto Akira | 4 |
| #9 | Araki Shuichi | 3 |
| #10 | Tomiyama Yasuhiro | 2 |
| Publication | Filing date | Title |
|---|---|---|
| KR20200031161A | Control method of vacuum valve | |
| CN109104875A | The more control devices of pressure and the more control methods of pressure in vacuum tank in vacuum tank | |
| KR20180111480A | Method for producing work using friction stir welding and work product | |
| TW201020435A | Vacuum gate valve and its opening and closing method | |
| KR20040024102A | Gate valve | |
| US6237892B1 | Gate valve |