| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | France | 3 | |
| #3 | Canada | 2 | |
| #4 | Denmark | 2 | |
| #5 | EPO (European Patent Office) | 2 | |
| #6 | Finland | 2 | |
| #7 | Netherlands | 2 | |
| #8 | Belgium | 1 | |
| #9 | Egypt | 1 | |
| #10 | United Kingdom | 1 | |
| #11 | Hungary | 1 | |
| #12 | Ireland | 1 | |
| #13 | Norway | 1 | |
| #14 | Turkey | 1 | |
| #15 | United States | 1 | |
| #16 | Yugoslavia (Serbia and Montenegro) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Machine tools | |
| #3 | Mechanical elements | |
| #4 | Civil engineering | |
| #5 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Shaping of plastics | |
| #2 | Pipes | |
| #3 | Certain plastics | |
| #4 | Perforating | |
| #5 | Unspecified technologies | |
| #6 | General building constructions | |
| #7 | Hydraulic engineering | |
| #8 | Fillers | |
| #9 | Separation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Oltmanns Heinrich | 17 |
| #2 | Volckmann Klaus | 4 |
| #3 | Flucke Bernhard | 4 |
| #4 | Oltmanns H | 4 |
| #5 | Granz Axel Ing Grad | 1 |
| #6 | Harr Klaus Dr | 1 |
| #7 | Dahlhoff Willi Prof Dr Ing | 1 |
| #8 | Granz Axel | 1 |
| #9 | Volckmann K | 1 |
| #10 | Daerr Georg-Michael Prof Dr In | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3001854A1 | Binder for brickwork, as compressed sheet - contg. fibrous material and hardenable binder | |
| DE2840174A1 | PLASTIC PIPE | |
| DE2823795A1 | FASTENERS FOR BRONES | |
| DE2823737A1 | DEVICE FOR CONTINUOUS PUNCHING OF THE WALL OF THIN-WALLED CORRUGATED PIPES | |
| DE2712389A1 | Corrugated plastic hose - with longitudinal ribs in plain sections improving flow resistance | |
| DE2638915A1 | Continuous encasing of plastic drain pipe in filter casing - with nozzles for blowing air laterally onto strip of filter material | |
| DE2638694A1 | Outside filter for plastic drain pipe - has strip wound during pipe transfer through rotating drum to form uniform layer | |
| GB1553378A | Apparatus for the production of plastics tubes |