| # | Country | Total Patents | |
|---|---|---|---|
| #1 | South Africa | 3 | |
| #2 | Australia | 2 | |
| #3 | United States | 2 | |
| #4 | Brazil | 1 | |
| #5 | Canada | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | Israel | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Basic materials chemistry |
| # | Technology | |
|---|---|---|
| #1 | Water treatment | |
| #2 | Soaps | |
| #3 | Preservation of human bodies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Buchan Leon | 8 |
| #2 | Buchan Pieter Walter William | 4 |
| #3 | Buchan Pieter W W | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US5023012A | Purification of water | |
| ZA8207908B | Water purification | |
| ZA8205795B | Water purification device | |
| CA1186967A | Purification of water | |
| ZA8203255B | Purification of water | |
| US4192763A | Chlorine tablet and the preparation thereof |