Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10833901 | Signal select in underground line location | Stephen John Petherick, Ion Dracea, Razvan Gabriel Stefanoiu, John Mark Royle | 2020-11-10 |
| 10063220 | Signal generator with multiple outputs | Ion Dracea, Razvan Gabriel Stefanoiu, Paul Lucian Lacatus | 2018-08-28 |
| 9877152 | Auto-locate operation | Mark Drew, Razvan Gabriel Stefanoiu | 2018-01-23 |
| 9473203 | Signal select in underground line location | Stephen John Petherick, Ion Dracea, Razvan Gabriel Stefanoiu, John Mark Royle | 2016-10-18 |