| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Argentina | 1 | |
| #2 | Australia | 1 | |
| #3 | Belgium | 1 | |
| #4 | Brazil | 1 | |
| #5 | Canada | 1 | |
| #6 | Switzerland | 1 | |
| #7 | Germany | 1 | |
| #8 | Spain | 1 | |
| #9 | France | 1 | |
| #10 | United Kingdom | 1 | |
| #11 | Italy | 1 | |
| #12 | Japan | 1 | |
| #13 | Luxembourg | 1 | |
| #14 | Netherlands | 1 | |
| #15 | Portugal | 1 | |
| #16 | Sweden | 1 | |
| #17 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Construction of roads |
| # | Name | Total Patents |
|---|---|---|
| #1 | Logan Cecil H | 6 |
| #2 | Kahr Joseph C | 6 |
| #3 | Logan C | 3 |
| #4 | Kahr J | 3 |
| #5 | Logan C H | 2 |
| #6 | Kahr J C | 2 |
| #7 | Seshiru Eichi Roogan | 1 |
| #8 | Jiyosefu Shii Kaa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ZA8002760B | Railroad grade crossing system |