| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Thermal processes | |
| #3 | Electrical machinery and energy | |
| #4 | Machines | |
| #5 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Special electric heating or lighting | |
| #2 | Unspecified technologies | |
| #3 | Details of furnaces | |
| #4 | Climate change mitigation in goods production | |
| #5 | Furnaces | |
| #6 | Pig-iron processing | |
| #7 | Metal tempering | |
| #8 | Alloys | |
| #9 | Foundry moulding | |
| #10 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Otto Junker | 12 |
| #2 | Karl Knauff | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3303258A | Vacuum induction furnace | |
| US2323051A | Electric furnace | |
| US1974743A | Electric muffle furnace | |
| US1906211A | Tensioning device for maintaining a given catenary curve in metal strips continuously pulled through an annealing furnace | |
| US1910549A | Method for increasing the rate of heat absorption of bright-surface material to be annealed | |
| US1701889A | Method for manufacturing metal sheets and strips | |
| US1615086A | Mold for casting metals | |
| US1699665A | Brass composition and process of producing the same |