| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 12 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Surface technology and coating | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Casting metal | |
| #2 | Devices for applying fluent materials | |
| #3 | Metal enamelling | |
| #4 | Grinding or polishing devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Projahn Heinrich | 7 |
| Publication | Filing date | Title |
|---|---|---|
| GB375159A | Process for the production of thick-walled hollow centrifugal metal castings |