| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Civil engineering | |
| #3 | Foods and drinks |
| # | Technology | |
|---|---|---|
| #1 | Internal-combustion piston engines | |
| #2 | Locks | |
| #3 | Supplying combustion engines | |
| #4 | Bakery products | |
| #5 | Cylinders for combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Otto Beyer | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1933002A | Two-stroke cycle internal combustion engine | |
| DE469532C | Internal combustion engine with cylinders and pistons lying one above the other |