| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 2 | |
| #2 | Spain | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Germany | 1 | |
| #7 | France | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Gearing | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Roano Alessandro | 3 |
| #2 | Ada Roano | 1 |
| #3 | Francesco Roano | 1 |
| #4 | Gino Roano | 1 |
| #5 | Alessandro Roano | 1 |
| #6 | Guglielmo Roano | 1 |
| #7 | Roberto Roano | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2923167A | Reversible gears | |
| ES222113A2 | A reversible gear system (Machine-translation by Google Translate, not legally binding) | |
| ES221955A1 | A reversible gear system (Machine-translation by Google Translate, not legally binding) | |
| GB785129A | Improvements in helical gears | |
| GB754031A | Improvements in reversible gears having helicoidal teeth and parallel axes | |
| CA571256A | Reversible gears having helicoidal teeth and parallel axes |