| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | Belgium | 2 | |
| #3 | France | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Canada | 1 | |
| #6 | Spain | 1 | |
| #7 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Shafts | |
| #3 | Safety devices | |
| #4 | Mining |
| # | Name | Total Patents |
|---|---|---|
| #1 | Voss Richard | 8 |
| #2 | Voss Richard Dipl Ing | 1 |
| #3 | Quante Heinrich | 1 |
| #4 | Voss R | 1 |
| #5 | Quante H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3531175A1 | Shut-off valve | |
| DE3530361A1 | Spray valve | |
| ZA8501946B | Pressure limiting valve | |
| GB8506651D0 | Pressure limiting valve | |
| DE3508986A1 | Pressure relief valve | |
| DE3426018A1 | Adjusting device for pressure-relief valves | |
| DE3421002A1 | Hydraulic prop of modular design | |
| GB8413885D0 | Vertical-hook compound mat | |
| DE3334895A1 | Vertical-hook composite mat | |
| DE3331395A1 | Vertical-hook composite mat | |
| DE3320276C1 | Vertical-hook composite mat |