| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 33 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Thermal processes | |
| #3 | Materials and metallurgy | |
| #4 | Machine tools | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Gas, coke and tar production | |
| #2 | Furnaces | |
| #3 | Producer gas production | |
| #4 | Presses | |
| #5 | Purifying gas composition | |
| #6 | Ammonia or cyanogen | |
| #7 | Casings for combustion chambers | |
| #8 | Heat-exchanger with contact | |
| #9 | Fire-fighting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Daniels Joseph | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE427586C | Chamber furnace with vertical furnace chambers for the distillation of coal u. like | |
| DE478250C | Furnace for the production of gas and coke |