| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 6 | |
| #2 | Switzerland | 4 | |
| #3 | Germany | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Materials and metallurgy | |
| #3 | Basic materials chemistry | |
| #4 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Chemical or physical processes | |
| #2 | Phosphatic fertilisers | |
| #3 | Water treatment | |
| #4 | Casting metal | |
| #5 | Rare-earth metal compounds | |
| #6 | Non-metallic elements | |
| #7 | Metal production and refining |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hofer Charles-Auguste | 5 |
| #2 | Commercial Cadic Compania Amer | 4 |
| #3 | Hofer Karl Dr-Ing | 1 |
| #4 | Hofer Charles Auguste | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB677200A | Improvements in or relating to a method of manufacture of castings of cryptocrystalline texture | |
| DE893494C | Process for the production of an active filter and catalyst material |