| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Basic communication technologies | |
| #4 | Materials and metallurgy | |
| #5 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Butler Charles R | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US3132634A | Cooling system for internal combustion engines | |
| US2799260A | Cooling system for internal combustion engines | |
| US1951646A | Piston manufacture | |
| US1891914A | Alloy piston | |
| US1757169A | Piston | |
| US1842745A | Piston | |
| US1727098A | Microadjusting device | |
| US1793051A | Microadjusting device | |
| US1532121A | Piston | |
| US1046148A | Electric testing apparatus. | |
| CA261431A | Piston |