| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 2 | |
| #2 | France | 2 | |
| #3 | Australia | 1 | |
| #4 | Canada | 1 | |
| #5 | Spain | 1 | |
| #6 | Italy | 1 | |
| #7 | Japan | 1 | |
| #8 | Netherlands | 1 | |
| #9 | Sweden | 1 | |
| #10 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Virlon Jean-Claude | 5 |
| #2 | Jiyan Kuroodo Biron | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JPS5263554A | Speed change gear | |
| US4137785A | Speed transmission devices | |
| FR2241216A5 | Speed varying device for general use - is for automobiles, machine tools etc. and has two discs separated by rollers |