| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 2 | |
| #2 | Austria | 1 | |
| #3 | Belgium | 1 | |
| #4 | Switzerland | 1 | |
| #5 | Denmark | 1 | |
| #6 | Spain | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Luxembourg | 1 | |
| #9 | Netherlands | 1 | |
| #10 | Sweden | 1 | |
| #11 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Pistons and sealings | |
| #2 | Shaping clay | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Drexler Fritz | 9 |
| #2 | Himmel Franz | 2 |
| Publication | Filing date | Title |
|---|---|---|
| ES312963A1 | Improvements in joints of annular form, with lines of board of layout in slot and language directed in the same sense. (Machine-translation by Google Translate, not legally binding) | |
| US3429581A | Sealing connection |