| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | United Kingdom | 2 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Materials and metallurgy | |
| #3 | Thermal processes | |
| #4 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Blasting | |
| #2 | Casting metal | |
| #3 | Furnaces | |
| #4 | Foundry moulding | |
| #5 | Photosensitive materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grocholl Karl | 2 |
| #2 | Karl Grocholl | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB523002A | Centrifuge for granular material for cleaning and scaling plants | |
| US2224647A | Sand centrifuging cleaning machine | |
| GB335381A | An improved device for projecting sand into moulds |