| # | Country | Total Patents | |
|---|---|---|---|
| #1 | German Democratic Republic | 2 | |
| #2 | Germany | 2 | |
| #3 | France | 2 | |
| #4 | Italy | 2 | |
| #5 | Japan | 2 | |
| #6 | Austria | 1 | |
| #7 | Australia | 1 | |
| #8 | Brazil | 1 | |
| #9 | Denmark | 1 | |
| #10 | United Kingdom | 1 | |
| #11 | Netherlands | 1 | |
| #12 | Sweden | 1 | |
| #13 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Heat-exchanger without contact | |
| #2 | Unspecified technologies | |
| #3 | Heat-exchange device details | |
| #4 | Shaping of plastics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hartmann Werner | 7 |
| #2 | Hartmann W | 5 |
| #3 | Buerunaa Harutoman | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2612514B1 | TUBE FLOOR OF A PIPE HEAT EXCHANGER | |
| DE2602312A1 | METHOD AND DEVICE FOR THE PRODUCTION OF FEDES, TUBES, PROFILES, RODS AND THE LIKE FROM PLASTIC |