| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Machines | |
| #3 | Materials and metallurgy | |
| #4 | Packaging and shipping | |
| #5 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Furnaces | |
| #2 | Milling | |
| #3 | Solid fuel combustion | |
| #4 | Presses | |
| #5 | Packaging | |
| #6 | Metal production and refining | |
| #7 | Transport or storage devices | |
| #8 | Supplying fuel to combustion device | |
| #9 | Details of furnaces | |
| #10 | Building materials |
| Publication | Filing date | Title |
|---|---|---|
| DE541289C | Bag filling machine | |
| DE508461C | Drum cooler, consisting of several coaxial drums | |
| DE504585C | Rotary kiln cooler | |
| DE500498C | Device for the automatic emptying of dusty or grainy material from a silo by means of a screw | |
| DE483687C | Rotary kiln cooler in which the cooling air is preferably supplied to that part of the drum that is covered with material |