| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 7 | |
| #2 | France | 3 | |
| #3 | Austria | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Ireland | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Machines | |
| #3 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Office furniture | |
| #2 | Chairs and beds | |
| #3 | Unspecified technologies | |
| #4 | Goods for writing upon |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hans Jenny | 4 |
| #2 | Paul Alabor | 4 |
| #3 | Max Altmann | 4 |
| Publication | Filing date | Title |
|---|---|---|
| US3402483A | Roller guides for blackboards having adjustable panel bodies | |
| FR1435650A | Roller guide for blackboards with vertically movable body | |
| IE27554L | Blackboards. | |
| FR1394040A | Height-adjustable wall-mounted blackboard | |
| GB1059590A | Improvements in blackboards | |
| FR1224752A | Skid chair |