| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 9 | |
| #2 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Unspecified technologies | |
| #3 | Metal-working | |
| #4 | Unspecified technologies | |
| #5 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bergeron Alfred | 12 |
| #2 | Bergeron Albert | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4192051A | Method for manufacturing fully sealed piston ring | |
| US3991455A | Coupled piston ring method of manufacture | |
| US3949997A | Piston ring structure | |
| CA233046A | Valve mechanism | |
| CA233045A | Valve mechanism | |
| CA233047A | Timer | |
| CA524703A | Piston rings | |
| CA374948A | Piston ring | |
| CA524701A | Piston packing rings | |
| CA524702A | Piston rings | |
| CA580209A | Handsaw | |
| CA528652A | Piston ring construction |