| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | Belgium | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Italy | 2 | |
| #5 | Austria | 1 | |
| #6 | France | 1 | |
| #7 | Netherlands | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Mechanical elements | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Analysing materials | |
| #3 | Testing of structures | |
| #4 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | Thoma Hans-Jurgen | 1 |
| #2 | Lindner Hans A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3100247A1 | Method and installation for producing stoneware pipes | |
| GB1578278A | Method of and apparatus for testing pipes | |
| ATA31877A | Stoneware pipes for a socket connection | |
| DE2605196A1 | Wall section profiling system for ceramic tubes - has still plastic tube supported against pressure exerted by rotating tubes | |
| DE2604100A1 | Elastic seal ring for concrete pipe coupling - has separate locating flange and sealing lip attached to anchor ring by thin walled sleeve |