| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 6 | |
| #2 | France | 3 | |
| #3 | Germany | 2 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Siphons | |
| #3 | Dredging | |
| #4 | Non-positive-displacement pumps | |
| #5 | Rotary pistons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bullock Percy William | 3 |
| #2 | Handley George | 3 |
| #3 | George Handley | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1516428A | Elevator, dredger, excavator, and the like | |
| GB187115A | Improvements in buckets for elevators, dredgers, excavators, and the like | |
| GB171860A | Improved means for raising water and other liquids by compressed air | |
| GB168418A | Improvements in rotary pumps | |
| GB159258A | Improvements relating to rotary pumps | |
| GB147280A | Improvements in rotary pumps for pumping liquids | |
| GB147283A | Improvements in or relating to rotary pumps |