| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | United Kingdom | 4 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Unspecified technologies | |
| #3 | Cyclically operating valves |
| # | Name | Total Patents |
|---|---|---|
| #1 | Alfred Bergeron | 9 |
| Publication | Filing date | Title |
|---|---|---|
| GB748685A | Piston rings | |
| GB747120A | Improvements in piston rings | |
| GB748677A | Piston rings | |
| GB750949A | Improvements in piston packing rings | |
| US2670258A | Piston ring construction | |
| US2670257A | Piston ring | |
| US2670255A | Piston packing ring | |
| US2670259A | Piston ring | |
| US2594282A | Piston ring construction | |
| US2190204A | Piston ring | |
| US1542209A | Wrist-pin mounting | |
| US1512901A | Valve-operating mechanism | |
| US1549104A | Piston ring |