| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 4 | |
| #2 | United States | 3 | |
| #3 | Canada | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | Australia | 1 | |
| #6 | Czechia | 1 | |
| #7 | Finland | 1 | |
| #8 | Mexico | 1 | |
| #9 | Norway | 1 | |
| #10 | New Zealand | 1 | |
| #11 | Poland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nevrekar Venkatesh R | 18 |
| Publication | Filing date | Title |
|---|---|---|
| MX9802960A | Valve. | |
| WO9911954A1 | Expanding gate valve | |
| WO9845628A1 | Gate valve | |
| EP0856114A1 | Valve | |
| EP0688410A1 | Expanding gate valve | |
| CA2157675A1 | Expanding gate valve | |
| US5342028A | Expanding valve assembly | |
| US5236345A | Expanding gate valve assembly | |
| US5205535A | Expanding gate valve assembly |