Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11118912 | Magnetic positioning system | Michael James Roper, Maxim Ralchenko | 2021-09-14 |
| 10277335 | Through-the-earth emergency radio system | Michael James Roper, Vladimir Puzakov | 2019-04-30 |
| 9866333 | Through-the-earth emergency radio system | Michael James Roper, Vladimir Puzakov | 2018-01-09 |
| 9564977 | Portable through-the-earth radio | Michael James Roper, Markus Svilans, Vladimir Puzakov | 2017-02-07 |
| 9450684 | System, method and apparatus for controlling buried devices | Michael James Roper, Vladimir Puzakov | 2016-09-20 |