| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Australia | 2 | |
| #3 | Canada | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | WIPO (World Intellectual Property Organization) | 2 | |
| #6 | Brazil | 1 | |
| #7 | China | 1 | |
| #8 | Mexico | 1 | |
| #9 | Norway | 1 | |
| #10 | Taiwan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Control |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Venting or aerating devices | |
| #3 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Friend Ronald G | 7 |
| #2 | Jones Michael A | 7 |
| #3 | Bliss Craig F | 6 |
| #4 | Jones Michael Allen | 3 |
| #5 | Friend Ronald George | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US6286534B1 | Pressure relief valve system including a pilot valve having a radial damper mechanism | |
| US6283138B1 | Pressure relief valve monitoring device |