| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Germany | 6 | |
| #3 | Austria | 3 | |
| #4 | France | 2 | |
| #5 | Denmark | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Sweden | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Basic materials chemistry | |
| #3 | Machines | |
| #4 | Macromolecular chemistry and polymers |
| # | Technology | |
|---|---|---|
| #1 | Building materials | |
| #2 | Treatment of glass | |
| #3 | Manufacturing processes | |
| #4 | Inorganic treatment materials | |
| #5 | Coating compositions | |
| #6 | Compounding ingredients |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walter Heidrich | 6 |
| #2 | Heidrich Walter | 5 |
| #3 | Klaus Koerner | 4 |
| #4 | Koerner Klaus | 3 |
| #5 | Heidrich W | 2 |
| #6 | Koerner K | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CH513775A | Light concrete prodn - with graded foam concrete additions | |
| US3536503A | Bloated clay and method of preparation | |
| DE1496027A1 | Filler and aggregate with a low specific weight and process for its production |