| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 | |
| #2 | France | 3 | |
| #3 | United Kingdom | 3 | |
| #4 | Switzerland | 2 | |
| #5 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Materials and metallurgy | |
| #3 | Machines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Cylinders for combustion engines | |
| #2 | Special machines | |
| #3 | Casting metal | |
| #4 | Pistons and sealings | |
| #5 | Unspecified technologies | |
| #6 | Shaping of plastics | |
| #7 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Peterson William F | 10 |
| #2 | Venner William M | 8 |
| #3 | Bowser Jr Percy L | 7 |
| #4 | Venner William Mayne | 3 |
| #5 | Jubel Henry A | 2 |
| #6 | Jr Percy Louis Bowser | 2 |
| #7 | Wainwright William N | 1 |
| #8 | Peterson William Fredrick | 1 |
| #9 | Ght William Nelson Wainwri | 1 |
| #10 | Jun Percy Louis Bowser | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2911269A | Trunk piston | |
| US2886867A | Piston molding machine | |
| US2874010A | Trunk piston | |
| US2874011A | Trunk piston | |
| GB825855A | Protection of piston ring groove walls | |
| US2771328A | Piston ring groove protector | |
| US2789329A | Piston molding machine | |
| US2874009A | Trunk piston | |
| US2795468A | Trunk piston | |
| GB753877A | Trunk piston and method of making same | |
| US2737428A | Trunk piston | |
| US2780505A | Trunk piston and method of making same | |
| US2737427A | Trunk piston | |
| GB721245A | Piston and casting process and machine | |
| US2737426A | Trunk piston |