| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 2 | |
| #3 | Germany | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Japan | 2 | |
| #6 | Netherlands | 2 | |
| #7 | Sweden | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Unspecified technologies | |
| #3 | Servomotors | |
| #4 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Massey Roger G | 10 |
| #2 | Holloway David G | 9 |
| #3 | Holloway D G | 2 |
| #4 | Rojiyaa Jii Matsushii | 2 |
| #5 | Massey R | 2 |
| #6 | Massey R G | 2 |
| #7 | Debitsudo Jii Horouei | 1 |
| #8 | Deibitsudo Jii Horouei | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4727899A | Pilot valve assembly | |
| US4559966A | Valve handle with selectable stops | |
| US4326627A | Limit switch for rotary control device | |
| US4193579A | Detachable handle for control devices | |
| US4087074A | Spring return valve actuator | |
| US4046350A | Power actuated valve | |
| US3744752A | Detachable handle for control devices | |
| US3722855A | Between flange valve assembly and clamping member |