| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | United States | 5 | |
| #3 | Austria | 2 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Rotary pistons | |
| #2 | Gearing | |
| #3 | Pistons and sealings | |
| #4 | Unspecified technologies | |
| #5 | Unspecified technologies | |
| #6 | Rotary-pistons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Krueger Friedrich Carl | 12 |
| #2 | Wallot Paul | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB191002077A | Improved Wedge Expanding Device. | |
| US978310A | Stuffing-box. | |
| US956712A | Wedge-expanding device. | |
| GB190812832A | Improvements in Power Engines or Pumps with Rotating Wing Pistons. | |
| US968859A | Engine having rotary piston. | |
| GB190713662A | Improvements in Power Engines or Pumps having Rotary Wing Pistons. | |
| GB190713560A | Improvements in Power Engines or Pumps with Rotating Wing Pistons. | |
| US902585A | Rotary engine. | |
| US898658A | Rotary engine. | |
| GB190612827A | Improvements in Engines or Pumps with Rotating Sliding-or Wing-pistons. |