| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Building materials | |
| #2 | General building constructions | |
| #3 | Finishing work on buildings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ehrenburg Leonid | 6 |
| #2 | Leonid Ehrenburg | 4 |
| Publication | Filing date | Title |
|---|---|---|
| ES241888A1 | A procedure to manufacture an additional product for cement or cement mortars (Machine-translation by Google Translate, not legally binding) | |
| CA587570A | Waterproofing agents for cement or concrete mixture and their method of production |