| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 6 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Engines, pumps and turbines | |
| #3 | Machine tools | |
| #4 | Mechanical elements | |
| #5 | Basic materials chemistry | |
| #6 | Surface technology and coating |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bramberry Harry M | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US3269739A | Piston ring construction | |
| US2465427A | Piston ring tool thimble | |
| US2470136A | Composition for treating metallic wear surfaces | |
| US2434880A | Cylinder surface character | |
| US2390417A | Method of manufacturing piston rings | |
| US2404616A | Piston ring | |
| US1764146A | Ring tool | |
| CA454908A | Piston ring | |
| CA458156A | Composition for treating metallic wear surfaces | |
| CA468445A | Wear surface filling | |
| CA444213A | Cylinder surface form and character | |
| CA438145A | Piston ring manufacture | |
| CA468446A | Relieved and filled cylinder surfaces |