| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Austria | 3 | |
| #3 | Denmark | 2 | |
| #4 | Belgium | 1 | |
| #5 | Finland | 1 | |
| #6 | France | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Pipes | |
| #3 | Shafts | |
| #4 | Metal-working |
| # | Name | Total Patents |
|---|---|---|
| #1 | Henry Guyer | 3 |
| #2 | Luigi Romano | 3 |
| #3 | Silvio Romano | 3 |
| #4 | Junker Ferber Nova-Werke | 1 |
| #5 | Otto Maurer | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3006704A | Piston ring |