| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 4 | |
| #2 | Germany | 4 | |
| #3 | Austria | 3 | |
| #4 | France | 3 | |
| #5 | Sweden | 3 | |
| #6 | Finland | 2 | |
| #7 | Belgium | 1 | |
| #8 | Denmark | 1 | |
| #9 | Spain | 1 | |
| #10 | United Kingdom | 1 | |
| #11 | Netherlands | 1 | |
| #12 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Packaging and shipping | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Wing fittings | |
| #2 | Indexing scheme relating to hinges | |
| #3 | Elevators and escalators | |
| #4 | Springs |
| # | Name | Total Patents |
|---|---|---|
| #1 | Buschhaus W | 10 |
| #2 | Buschhaus Werner | 6 |
| #3 | Werner Buschhaus | 3 |
| Publication | Filing date | Title |
|---|---|---|
| DE2605697A1 | DOOR LOCKING DEVICE | |
| DE2518691B1 | DOOR CLOSER | |
| GB1316551A | Damping devices for doors |