| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Germany | 3 | |
| #3 | France | 3 | |
| #4 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Containers for goods storage | |
| #3 | Servomotors |
| # | Name | Total Patents |
|---|---|---|
| #1 | Douglass Walter | 8 |
| #2 | Burgoyne Richard Alan | 2 |
| #3 | Douglass Alfred | 2 |
| #4 | Hiley-Dyson Phillip Aston | 1 |
| #5 | Dyson Philip Aston Hiley | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1170957A | Fluid Control Valves. | |
| GB1072434A | Improvements in or relating to semi-rotary actuators, particularly for flow control valves | |
| GB908295A | Improvements in or relating to valve-like devices for controlling flow | |
| GB803145A | Improvements in or relating to flow control devices | |
| GB803144A | Improvements in or relating to flow control devices | |
| CA691831A | Flow control devices |