| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 2 | |
| #2 | Netherlands | 2 | |
| #3 | Canada | 1 | |
| #4 | Switzerland | 1 | |
| #5 | Denmark | 1 | |
| #6 | Finland | 1 | |
| #7 | France | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Japan | 1 | |
| #10 | Luxembourg | 1 | |
| #11 | Norway | 1 | |
| #12 | Sweden | 1 | |
| #13 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Advertising |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hoop William | 10 |
| #2 | Hoop W | 1 |
| #3 | Hoop William J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2728129A1 | Automatic wall mounted advertisement display - has individual display cards located on belt that is rotated behind housing transparent window (NL 24.1.78) | |
| DE2635567A1 | DISPLAY COLUMN | |
| CH614063A5 | Advertising pillar, preferably for public streets and squares |