| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | Austria | 2 | |
| #3 | France | 2 | |
| #4 | Argentina | 1 | |
| #5 | Brazil | 1 | |
| #6 | Canada | 1 | |
| #7 | Switzerland | 1 | |
| #8 | German Democratic Republic | 1 | |
| #9 | Denmark | 1 | |
| #10 | Egypt | 1 | |
| #11 | Finland | 1 | |
| #12 | United Kingdom | 1 | |
| #13 | Greece | 1 | |
| #14 | Hungary | 1 | |
| #15 | Ireland | 1 | |
| #16 | Israel | 1 | |
| #17 | Italy | 1 | |
| #18 | Japan | 1 | |
| #19 | Netherlands | 1 | |
| #20 | Norway | 1 | |
| #21 | New Zealand | 1 | |
| #22 | Poland | 1 | |
| #23 | Portugal | 1 | |
| #24 | Sweden | 1 | |
| #25 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #26 | Turkey | 1 | |
| #27 | Yugoslavia (Serbia and Montenegro) | 1 | |
| #28 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Pumps | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hartmann Werner | 13 |
| #2 | Hartmann W | 7 |
| #3 | Otto Magerle Ing | 1 |
| Publication | Filing date | Title |
|---|---|---|
| IE770178L | Pipe connector | |
| DE2648256A1 | Coupling for plain pipe ends - has double conical shape and matching axial clamps to compress pliable sleeve onto pipes | |
| DE2630814A1 | PIPE CONNECTION | |
| DE2518898A1 | Pipe connector with sleeve covering adjacent pipe ends - has flanged rings for gripping opposite cones of sleeve |