| # | Country | Total Patents | |
|---|---|---|---|
| #1 | South Africa | 7 | |
| #2 | Australia | 3 | |
| #3 | Zimbabwe | 3 | |
| #4 | United Kingdom | 2 | |
| #5 | Zambia | 2 | |
| #6 | Malawi | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Sewers | |
| #2 | Domestic plumbing installations | |
| #3 | Shaping of plastics | |
| #4 | Pipes | |
| #5 | Certain plastics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hartl Erwin | 8 |
| #2 | Kuiper Jan Lionel | 3 |
| #3 | Erwin Hartl | 2 |
| #4 | Villiers Michael John De | 2 |
| #5 | Eduard Rudolph Koller | 1 |
| #6 | Jan Lionel Kuiper | 1 |
| #7 | De Villiers Michael John | 1 |
| #8 | Coenrad Hendrik Walters | 1 |
| #9 | Michael John De Villiers | 1 |
| #10 | Karl Henry Hoffman | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ZA8708838B | Production of decorated sheet material | |
| ZW14885A1 | Extrusion die arrangement and automatic centering extrusion method | |
| ZA8506876B | Extrusion die arrangement and automatic centering extrusion method | |
| ZM3985A1 | Method of shaping pipe ends | |
| ZW9285A1 | Method of shaping pipe ends | |
| ZA8504155B | Method of shaping pipe ends | |
| ZA8502476B | Pipe fittings | |
| ZA8309306B | Pipe coupling device | |
| ZA8308911B | Overflow fitting | |
| ZW25683A1 | Improvements in and relating fittings adapted to provide an overflow outlet in a pipe line | |
| ZA8308340B | Expansion joint | |
| AU8756782A | Shouldered end conduit |