| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 1 | |
| #2 | Bulgaria | 1 | |
| #3 | Canada | 1 | |
| #4 | China | 1 | |
| #5 | Czechoslovakia | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | Finland | 1 | |
| #8 | Croatia | 1 | |
| #9 | India | 1 | |
| #10 | Japan | 1 | |
| #11 | Portugal | 1 | |
| #12 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #13 | Turkey | 1 | |
| #14 | United States | 1 | |
| #15 | Yugoslavia (Serbia and Montenegro) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Shafts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Heiliger Martha-Catharina | 15 |
| Publication | Filing date | Title |
|---|---|---|
| HRP940589A2 | Articulated steel cap for mining support | |
| EP0273122A1 | Articulated steel cap for a mining support |