Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7589516 | Poly-phase electric energy meter | Volker Rzehak, Stephen James Underwood, Thomas Hung Lam Kot | 2009-09-15 |
| 6943539 | Electricity meter with multiple gains signal to an A/D converter | Stephen James Underwood | 2005-09-13 |