| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 1 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Control |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Venting or aerating devices | |
| #3 | Earth drilling | |
| #4 | Servomotors | |
| #5 | Systems controlling non-electric variables | |
| #6 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Watson Richard R | 7 |
| #2 | Hollister F Harold | 3 |
| #3 | Hope Rodney C | 2 |
| #4 | Sarlls Jr Edward C | 1 |
| #5 | Allen Stanley C | 1 |
| #6 | Curtiss Iii Jason P | 1 |
| #7 | Sarlls Edward C Jr | 1 |
| #8 | Springett Frank B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2011073792A1 | Hemispherical Wedge Valve with Laminar Flow | |
| US6527010B1 | Single pilot dual pulse spool valve | |
| US2002100501A1 | BOP operating system with quick dump valve | |
| US6257268B1 | Pressure biased shuttle valve | |
| US6318400B1 | Low interflow hydraulic shuttle valve | |
| US5771931A | High pressure wear resistant pilot valve | |
| US4856557A | Sliding metal seal valve mechanism | |
| US4793590A | Piloted check valve | |
| US4493335A | Shear valve | |
| US4456028A | Relief gate valve | |
| US4253481A | Cushioned shuttle valve |