Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6964396 | Automatic accel voltage tracking system for an ion thruster | John Dalton Williams, John R. Beattie | 2005-11-15 |
| 6948305 | Method and apparatus for balancing the emission current of neutralizers in ion thruster arrays | John R. Beattie | 2005-09-27 |