| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Canada | 2 | |
| #3 | Germany | 2 | |
| #4 | EPO (European Patent Office) | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Italy | 1 | |
| #8 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Aeroplanes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Roman Stephan | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US4759689A | Bladed aircraft rotor with flexible blade mountings | |
| US4708591A | Bladed aircraft rotor with flexible blade mountings | |
| US4502840A | Blade pitch control in rotatable bladed devices for vehicles | |
| DE3104682A1 | Bearing for a rotary-wing aircraft | |
| US4266912A | Rotor blade support setup for rotary wing aircraft |