| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | United Kingdom | 3 | |
| #3 | Canada | 2 | |
| #4 | United States | 2 | |
| #5 | Austria | 1 | |
| #6 | Switzerland | 1 | |
| #7 | Denmark | 1 | |
| #8 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Cyclically operating valves | |
| #2 | Cylinders for combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gross Dr Court | 2 |
| #2 | Gross Court | 2 |
| #3 | Gross Dr Phil Court | 2 |
| #4 | Court Gross | 2 |
| #5 | Av Motoraktieselskapet | 1 |
| #6 | Gross Court Dr | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB532288A | Valve arrangements for internal combustion motors, particularly for single cylinder and radial cylinder motors | |
| GB530934A | Improvements in rotary valves for internal combustion engines | |
| US2216836A | Rotating sleeve valve for combustion motors | |
| US2162304A | Internally cooled valve for combustion engines | |
| GB464748A | Improvements in rotating valves for internal combustion engines | |
| CA393422A | Rotating sleeve valve for engines | |
| CA373984A | Engine rotating valve |