| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 | |
| #2 | Canada | 9 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Engines, pumps and turbines | |
| #4 | Machine tools | |
| #5 | Materials and metallurgy | |
| #6 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Cylinders for combustion engines | |
| #5 | Sawing | |
| #6 | Locks | |
| #7 | Special machines | |
| #8 | Metal tempering | |
| #9 | Machines | |
| #10 | Metal-working |
| # | Name | Total Patents |
|---|---|---|
| #1 | Six Walter J | 25 |
| Publication | Filing date | Title |
|---|---|---|
| US2558224A | Piston expander | |
| US2475726A | Automatic locking device | |
| US2417665A | Piston expander | |
| US2397056A | Piston expander | |
| US2383893A | Piston expander | |
| US2183358A | Process for manufacturing piston rings | |
| US2046587A | Piston | |
| US2034005A | Expander for piston skirts | |
| US2034004A | Piston expander | |
| US2132653A | Piston expander | |
| US2078033A | Piston expander | |
| US1958154A | Piston expansion means | |
| US1859057A | Method of making piston rings | |
| US1933568A | Method of making piston rings | |
| US1567398A | Piston | |
| US1602509A | Machine for cutting piston rings | |
| CA288217A | Piston ring | |
| CA464126A | Piston expander | |
| CA475093A | Piston expanders | |
| CA374801A | Piston expander |