Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9544023 | Cable assembly for providing power through inductive coupling | Nikolay Nikolov Tzonev, Dale John Shpak | 2017-01-10 |
| 8776596 | Apparatus for the monitoring of floating roof position for storage tank roofs | Nikolay Nikolov Tzonev, Dale John Shpak, Kevin James Gans | 2014-07-15 |