| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 4 | |
| #2 | Canada | 1 | |
| #3 | Switzerland | 1 | |
| #4 | Germany | 1 | |
| #5 | Spain | 1 | |
| #6 | France | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Separation | |
| #3 | Machines for making railways |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hejlek Franz Ing | 3 |
| #2 | Hejlek Franz | 3 |
| Publication | Filing date | Title |
|---|---|---|
| CA1058097A | Method for the continuous multiplied enrichment of gaseous isotopes of heavy elements | |
| GB676307A | Improvements in and relating to permanent way constructions | |
| ES189104A1 | Improvements improved in the superstructures for railways |