| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 36 | |
| #2 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Civil engineering | |
| #3 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Pipes | |
| #3 | Water-closets with flushing devices | |
| #4 | Spark gaps and corona devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | May Karl Peter | 15 |
| Publication | Filing date | Title |
|---|---|---|
| GB273344A | Improvements in pipe joints | |
| GB303408A | Improvements in pipe joints |