| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Canada | 5 | |
| #3 | EPO (European Patent Office) | 3 | |
| #4 | Australia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Ladders |
| # | Name | Total Patents |
|---|---|---|
| #1 | Marques Salvador Alimbau | 6 |
| #2 | Grasselli Giorgio | 3 |
| #3 | Marques Salvador A | 2 |
| #4 | Alimbau Marques Salvador | 2 |
| #5 | Alimbeau Marques Salvador | 1 |
| #6 | Ralabate James J | 1 |
| #7 | Alimbau Marques D Salvador | 1 |
| #8 | Alimbeau Salvador | 1 |
| #9 | Marques D Salvador Alimbau | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU4037185A | Convertible fold-up ladder | |
| EP0135757A2 | Work top and work bench | |
| CA1223625A | Detachable workbench top | |
| US4519476A | Detachable workbench top | |
| CA1225975A | Fold-up ladder | |
| US4574918A | Ladder locking mechanism | |
| US4493392A | Convertible fold-up ladder | |
| US4448283A | Portable fold-up ladder | |
| US4429766A | Ladder consisting of sliding sections | |
| US4457391A | Fold-up ladder |