| # | Country | Total Patents | |
|---|---|---|---|
| #1 | South Africa | 5 | |
| #2 | Canada | 3 | |
| #3 | Germany | 2 | |
| #4 | Sweden | 2 | |
| #5 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Chemical engineering | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Chemical or physical processes | |
| #2 | Treatment of glass | |
| #3 | Mixing | |
| #4 | Foundry moulding | |
| #5 | Milling | |
| #6 | Non-metallic elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Eirich W | 10 |
| #2 | Eirich G | 8 |
| #3 | Ries H | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE2117957A1 | Refiner/mixer - for stiff consistency materials | |
| ZA7004564B | Method for granulating a glass batch |