| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Argentina | 1 | |
| #3 | Brazil | 1 | |
| #4 | Canada | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Spain | 1 | |
| #7 | Hong Kong | 1 | |
| #8 | Mexico | 1 | |
| #9 | Taiwan | 1 | |
| #10 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Measurement | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Radio navigation | |
| #2 | Alarm systems | |
| #3 | Traffic control systems | |
| #4 | Vehicle parts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Apsell Sheldon P | 8 |
| #2 | Stapelfeld Norval D | 6 |
| #3 | Stapelfeld Noval D | 2 |
| #4 | Reagan William R | 1 |
| #5 | Duvall William R | 1 |
| #6 | William R Duvall | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ZA9509074B | Vehicle tracking transponder system and transponding method | |
| AR243285A1 | A device for locating lost objects. | |
| CA1333635C | Transponder vehicle tracking apparatus | |
| US4908629A | Apparatus for locating and/or tracking stolen or missing vehicles and the like | |
| US4818998A | Method of and system and apparatus for locating and/or tracking stolen or missing vehicles and the like | |
| US4177466A | Auto theft detection system |