| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 2 | |
| #3 | Germany | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Civil engineering | |
| #4 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Servomotors | |
| #3 | Venting or aerating devices | |
| #4 | Earth drilling | |
| #5 | Presses | |
| #6 | Shaping of plastics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Olmsted Peter B | 8 |
| #2 | Groves Ii Frank W | 2 |
| #3 | B Olmsted Peter | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2008054208A1 | Elbow plug external sleeve valve | |
| US3949779A | Flow shut off valve | |
| US3968813A | Flow shut off valve | |
| US3902319A | Method and apparatus for instantaneously isolating a fluid operated load applying cylinder from its source | |
| US3635152A | Hydraulic press | |
| US3584646A | Spool valve | |
| US3401713A | Prefill valve | |
| CA840173A | Valve | |
| CA903049A | Spool valve |