| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 3 | |
| #3 | Australia | 1 | |
| #4 | Germany | 1 | |
| #5 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Materials and metallurgy | |
| #3 | Mechanical elements | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Casting metal | |
| #2 | Furnaces | |
| #3 | Special furnaces and ovens | |
| #4 | Details of furnaces | |
| #5 | Venting or aerating devices | |
| #6 | Unspecified technologies | |
| #7 | Metal tempering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schaefer Richard L | 10 |
| #2 | Schaefer Carl W D | 8 |
| #3 | Miller Norman L | 7 |
| #4 | Williamson James M | 5 |
| #5 | Kennedy Gordon F | 3 |
| #6 | Schaefer Richard Lee | 1 |
| #7 | Kennedy Gordon Forbes | 1 |
| #8 | Schaefer Carl Wernli Dudley | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA2195284A1 | Valve assembly | |
| US6152159A | Valve assembly and method for use in delivery of molten metal | |
| WO9501236A1 | Low pressure casting process and apparatus | |
| US5590681A | Valve assembly | |
| US4027862A | Metal melting furnace with alternate heating systems | |
| US3996412A | Aluminum melting furnace |