| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 5 | |
| #2 | Denmark | 5 | |
| #3 | Switzerland | 2 | |
| #4 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Transport | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Transport or storage devices | |
| #2 | Railway systems | |
| #3 | Clutches and brakes | |
| #4 | Elevators and escalators | |
| #5 | Locomotives | |
| #6 | Railway shifting | |
| #7 | Railway equipment |
| # | Name | Total Patents |
|---|---|---|
| #1 | Oehrnell Olof | 11 |
| #2 | Olof Oehrnell | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE3147904A1 | Pipe coupling |