| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | Switzerland | 3 | |
| #3 | Austria | 2 | |
| #4 | German Democratic Republic | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Installations for obtaining water | |
| #3 | Foundations and excavations | |
| #4 | Climate change adaptation technologies | |
| #5 | Sewers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Anders Adelheid | 2 |
| #2 | Rosai Alfred | 2 |
| #3 | Messmer Robert | 2 |
| #4 | Eiglsperger Johann | 2 |
| #5 | Kottmann Albrecht Prof Dr Ing | 1 |
| #6 | Drittenpreis Josef | 1 |
| #7 | Eiglsperger Hans | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CH692708A5 | Height-adjustable manhole cover comprises two parts, one set inside other, so that they can be inserted or withdrawn | |
| CH692709A5 | Height-adjustable manhole cover has housing comprising upper part screwed into lower part, with rotation of upper part altering its height | |
| ATA172597A | Road coverplate | |
| ATA173297A | Surface box | |
| DE19542118C1 | Anti-extraction securing device for fluid-containing pipes | |
| DE19533648A1 | Pipe coupling | |
| DE4413062A1 | Street inlet | |
| DE4101503A1 | Lockable street cap | |
| DE2431741A1 | Pipe branch connector attachment - is held to mains duct by shaped adapter with band clamp |