| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Machine tools | |
| #4 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Pistons and sealings | |
| #3 | Metal-working | |
| #4 | Metal tempering | |
| #5 | Casting metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Flammang John | 6 |
| #2 | Frank Harry S | 3 |
| #3 | Hartog Stephen D | 2 |
| #4 | Franz John William | 1 |
| #5 | Frank Harry Saul | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA194774A | Piston ring | |
| US1386707A | Piston-ring | |
| US1361989A | Method of making piston-rings | |
| US1295150A | Manufacture of piston-rings. | |
| US1283139A | Centrifugal casting-machine. | |
| US1295147A | Process for making piston-rings. | |
| AU268916B | Improvement in metallic piston rings | |
| CA175878A | Piston ring | |
| US1283138A | Process of making piston-rings. | |
| US1212337A | Process of manufacturing piston-rings. | |
| CA169457A | Piston ring | |
| US1165085A | Piston-ring. | |
| US1165084A | Spiral piston-ring. | |
| CA205153A | Automobile radiator |