| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 4 | |
| #2 | United States | 4 | |
| #3 | United Kingdom | 3 | |
| #4 | Canada | 2 | |
| #5 | Germany | 2 | |
| #6 | France | 2 | |
| #7 | Italy | 2 | |
| #8 | Japan | 2 | |
| #9 | Argentina | 1 | |
| #10 | Austria | 1 | |
| #11 | Belgium | 1 | |
| #12 | Brazil | 1 | |
| #13 | Switzerland | 1 | |
| #14 | Hong Kong | 1 | |
| #15 | Ireland | 1 | |
| #16 | Mexico | 1 | |
| #17 | Malaysia | 1 | |
| #18 | Netherlands | 1 | |
| #19 | Sweden | 1 | |
| #20 | Singapore | 1 | |
| #21 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | General building constructions | |
| #2 | Advertising | |
| #3 | Indexing scheme relating to hinges | |
| #4 | Doors and windows | |
| #5 | Hinges for doors or windows |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ytter Willy | 16 |
| #2 | Ytter W | 4 |
| #3 | Uirii Itsutaa | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US4678246A | Display device | |
| US4601524A | Display device | |
| AU8319182A | Display system | |
| US4436135A | Portable display system | |
| US4147198A | Portable display system |