| # | Country | Total Patents | |
|---|---|---|---|
| #1 | India | 2 | |
| #2 | South Africa | 2 | |
| #3 | Zimbabwe | 2 | |
| #4 | Australia | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Kenya | 1 | |
| #8 | Malawi | 1 | |
| #9 | African Intellectual Property Organization | 1 | |
| #10 | Portugal | 1 | |
| #11 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | General building constructions | |
| #2 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | Olsen Randolffa Rudolph | 8 |
| #2 | Randolffa Rudolph Olsen | 3 |
| #3 | Olsen Randolffa R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ZW7283A1 | Interlocking building block system | |
| GB8307843D0 | Moulding building blocks | |
| ZW30580A1 | Building blocks |