| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Germany | 2 | |
| #3 | France | 2 | |
| #4 | Canada | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machine tools | |
| #3 | Environmental technology | |
| #4 | Machines | |
| #5 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walter Robert Dennis | 4 |
| #2 | Walter Robert Denis | 1 |
| #3 | Walter Robert | 1 |
| #4 | Walter Robert D | 1 |
| #5 | Edward Merritt Henry | 1 |
| #6 | Dennis Walter Robert | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1155084A | Improvements relating to Rotary Fluid Pumps and Motors | |
| GB1098085A | Improvements relating to rotary fluid pumps and motors | |
| GB1046075A | Improvements relating to valves for controlling the flow of hydraulic fluid | |
| GB1046074A | Improvements relating to valves for controlling the flow of hydraulic fluid | |
| GB928710A | Improvements relating to rotary flexible vane pumps | |
| CA849274A | Fluid pumps and motors |