| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 21 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Engines, pumps and turbines | |
| #3 | Civil engineering | |
| #4 | Measurement | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Cycles | |
| #2 | Cylinders for combustion engines | |
| #3 | Vehicle parts | |
| #4 | Internal-combustion piston engines | |
| #5 | Swimming pools | |
| #6 | Cyclically operating valves | |
| #7 | Measuring volume | |
| #8 | Lubricating of machines | |
| #9 | Shafts | |
| #10 | Street cleaning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stolle Martin | 18 |
| #2 | Kolb Hans | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB245658A | Improvements in or relating to the valves of internal combustion engines |